56121817506136 has 64 divisors (see below), whose sum is σ = 112972960886400. Its totient is φ = 26058995336448.

The previous prime is 56121817506113. The next prime is 56121817506199. The reversal of 56121817506136 is 63160571812165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13706206 + ... + 17323501.

It is an arithmetic number, because the mean of its divisors is an integer number (1765202513850).

Almost surely, 2^{56121817506136} is an apocalyptic number.

It is an amenable number.

56121817506136 is an abundant number, since it is smaller than the sum of its proper divisors (56851143380264).

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

56121817506136 is a wasteful number, since it uses less digits than its factorization.

56121817506136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31029968 (or 31029964 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 56121817506136 in words is "fifty-six trillion, one hundred twenty-one billion, eight hundred seventeen million, five hundred six thousand, one hundred thirty-six".