51157733136 has 80 divisors (see below), whose sum is σ = 136564973568. Its totient is φ = 16485033600.

The previous prime is 51157733131. The next prime is 51157733189. The reversal of 51157733136 is 63133775115.

51157733136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51157733136² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51157733131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1427145 + ... + 1462551.

Almost surely, 2^51157733136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51157733136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68282486784).

51157733136 is an abundant number, since it is smaller than the sum of its proper divisors (85407240432).

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

51157733136 is a wasteful number, since it uses less digits than its factorization.

51157733136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36420 (or 36414 counting only the distinct ones).

The product of its digits is 198450, while the sum is 42.

The spelling of 51157733136 in words is "fifty-one billion, one hundred fifty-seven million, seven hundred thirty-three thousand, one hundred thirty-six".