56135124636021 has 8 divisors (see below), whose sum is σ = 83163147608960. Its totient is φ = 37423416423996.

The previous prime is 56135124635983. The next prime is 56135124636023. The reversal of 56135124636021 is 12063642153165.

It is a happy number.

56135124636021 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 5 + 1 + 2 + 4 + 636 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 56135124636021 - 2⁷ = 56135124635893 is a prime.

It is a super-2 number, since 2×56135124636021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56135124636023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039539345085 + ... + 1039539345138.

It is an arithmetic number, because the mean of its divisors is an integer number (10395393451120).

Almost surely, 2^{56135124636021} is an apocalyptic number.

It is an amenable number.

56135124636021 is a deficient number, since it is larger than the sum of its proper divisors (27028022972939).

56135124636021 is a wasteful number, since it uses less digits than its factorization.

56135124636021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079078690232 (or 2079078690226 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

Adding to 56135124636021 its reverse (12063642153165), we get a palindrome (68198766789186).

The spelling of 56135124636021 in words is "fifty-six trillion, one hundred thirty-five billion, one hundred twenty-four million, six hundred thirty-six thousand, twenty-one".