51550165600 has 72 divisors (see below), whose sum is σ = 125930018088. Its totient is φ = 20606438400.

The previous prime is 51550165567. The next prime is 51550165621. The reversal of 51550165600 is 656105515.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1236292 + ... + 1277308.

It is an arithmetic number, because the mean of its divisors is an integer number (1749028029).

Almost surely, 2^51550165600 is an apocalyptic number.

51550165600 is a gapful number since it is divisible by the number (50) 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 51550165600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62965009044).

51550165600 is an abundant number, since it is smaller than the sum of its proper divisors (74379852488).

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

51550165600 is a wasteful number, since it uses less digits than its factorization.

51550165600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42608 (or 42595 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 51550165600 in words is "fifty-one billion, five hundred fifty million, one hundred sixty-five thousand, six hundred".