56436737121 has 28 divisors (see below), whose sum is σ = 84652500240. Its totient is φ = 37608439320.

The previous prime is 56436737099. The next prime is 56436737131. The reversal of 56436737121 is 12173763465.

56436737121 is a `hidden beast` number, since 564 + 3 + 6 + 73 + 7 + 12 + 1 = 666.

It is not a de Polignac number, because 56436737121 - 2⁶ = 56436737057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56436737131) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1835686 + ... + 1866176.

It is an arithmetic number, because the mean of its divisors is an integer number (3023303580).

Almost surely, 2^56436737121 is an apocalyptic number.

It is an amenable number.

56436737121 is a deficient number, since it is larger than the sum of its proper divisors (28215763119).

56436737121 is an equidigital number, since it uses as much as digits as its factorization.

56436737121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33048 (or 33033 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 56436737121 in words is "fifty-six billion, four hundred thirty-six million, seven hundred thirty-seven thousand, one hundred twenty-one".