23656019985 has 48 divisors (see below), whose sum is σ = 44289305424. Its totient is φ = 11611385856.

The previous prime is 23656019951. The next prime is 23656020001. The reversal of 23656019985 is 58991065632.

It is a happy number.

23656019985 is a `hidden beast` number, since 23 + 6 + 5 + 601 + 9 + 9 + 8 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 8376093441 + 15279926544 = 91521^2 + 123612^2 .

It is not a de Polignac number, because 23656019985 - 2⁹ = 23656019473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137149 + ... + 257141.

It is an arithmetic number, because the mean of its divisors is an integer number (922693863).

Almost surely, 2^23656019985 is an apocalyptic number.

It is an amenable number.

23656019985 is a deficient number, since it is larger than the sum of its proper divisors (20633285439).

23656019985 is a wasteful number, since it uses less digits than its factorization.

23656019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120354 (or 120351 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 23656019985 in words is "twenty-three billion, six hundred fifty-six million, nineteen thousand, nine hundred eighty-five".