51555535196256 has 576 divisors, whose sum is σ = 187001454850560. Its totient is φ = 13456695214080.

The previous prime is 51555535196251. The next prime is 51555535196267. The reversal of 51555535196256 is 65269153555515.

51555535196256 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 5 + 5 + 3 + 519 + 62 + 56 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 51555535196193 and 51555535196202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555535196251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 739738371 + ... + 739808061.

It is an arithmetic number, because the mean of its divisors is an integer number (324655303560).

Almost surely, 2^{51555535196256} is an apocalyptic number.

51555535196256 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51555535196256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93500727425280).

51555535196256 is an abundant number, since it is smaller than the sum of its proper divisors (135445919654304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51555535196256 is a wasteful number, since it uses less digits than its factorization.

51555535196256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69924 (or 69813 counting only the distinct ones).

The product of its digits is 151875000, while the sum is 63.

The spelling of 51555535196256 in words is "fifty-one trillion, five hundred fifty-five billion, five hundred thirty-five million, one hundred ninety-six thousand, two hundred fifty-six".