23568845138 has 4 divisors (see below), whose sum is σ = 35353267710. Its totient is φ = 11784422568.

The previous prime is 23568845107. The next prime is 23568845147. The reversal of 23568845138 is 83154886532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19158158569 + 4410686569 = 138413^2 + 66413^2 .

It is a super-2 number, since 2×23568845138² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23568845138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5892211283 + ... + 5892211286.

Almost surely, 2^23568845138 is an apocalyptic number.

23568845138 is a deficient number, since it is larger than the sum of its proper divisors (11784422572).

23568845138 is a wasteful number, since it uses less digits than its factorization.

23568845138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11784422571.

The product of its digits is 5529600, while the sum is 53.

The spelling of 23568845138 in words is "twenty-three billion, five hundred sixty-eight million, eight hundred forty-five thousand, one hundred thirty-eight".