51556507001496 has 192 divisors, whose sum is σ = 160405906003200. Its totient is φ = 14654177282304.

The previous prime is 51556507001479. The next prime is 51556507001497. The reversal of 51556507001496 is 69410070565515.

It is a happy number.

51556507001496 is a `hidden beast` number, since 5 + 1 + 5 + 565 + 0 + 70 + 0 + 1 + 4 + 9 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51556507001497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1316440011 + ... + 1316479173.

It is an arithmetic number, because the mean of its divisors is an integer number (835447427100).

Almost surely, 2^{51556507001496} is an apocalyptic number.

51556507001496 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 51556507001496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80202953001600).

51556507001496 is an abundant number, since it is smaller than the sum of its proper divisors (108849399001704).

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

51556507001496 is a wasteful number, since it uses less digits than its factorization.

51556507001496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52638 (or 52631 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 54.

The spelling of 51556507001496 in words is "fifty-one trillion, five hundred fifty-six billion, five hundred seven million, one thousand, four hundred ninety-six".