51041994156 has 60 divisors (see below), whose sum is σ = 138035047920. Its totient is φ = 16427305440.

The previous prime is 51041994139. The next prime is 51041994161. The reversal of 51041994156 is 65149914015.

51041994156 is a `hidden beast` number, since 510 + 4 + 1 + 99 + 41 + 5 + 6 = 666.

51041994156 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 2×51041994156² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2706760 + ... + 2725551.

It is an arithmetic number, because the mean of its divisors is an integer number (2300584132).

Almost surely, 2^51041994156 is an apocalyptic number.

It is an amenable number.

51041994156 is an abundant number, since it is smaller than the sum of its proper divisors (86993053764).

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

51041994156 is a wasteful number, since it uses less digits than its factorization.

51041994156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432356 (or 5432345 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 51041994156 in words is "fifty-one billion, forty-one million, nine hundred ninety-four thousand, one hundred fifty-six".