56120123511 has 40 divisors (see below), whose sum is σ = 84439042688. Its totient is φ = 37144008000.

The previous prime is 56120123489. The next prime is 56120123513. The reversal of 56120123511 is 11532102165.

56120123511 is a `hidden beast` number, since 5 + 6 + 1 + 20 + 123 + 511 = 666.

It is not a de Polignac number, because 56120123511 - 2⁹ = 56120122999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56120123513) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9688026 + ... + 9693816.

Almost surely, 2^56120123511 is an apocalyptic number.

56120123511 is a deficient number, since it is larger than the sum of its proper divisors (28318919177).

56120123511 is a wasteful number, since it uses less digits than its factorization.

56120123511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6636 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 56120123511 its reverse (11532102165), we get a palindrome (67652225676).

The spelling of 56120123511 in words is "fifty-six billion, one hundred twenty million, one hundred twenty-three thousand, five hundred eleven".