23768739639 has 6 divisors (see below), whose sum is σ = 34332623936. Its totient is φ = 15845826420.

The previous prime is 23768739593. The next prime is 23768739661. The reversal of 23768739639 is 93693786732.

23768739639 is a `hidden beast` number, since 237 + 6 + 8 + 7 + 396 + 3 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-23768739639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23768739679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1320485527 + ... + 1320485544.

Almost surely, 2^23768739639 is an apocalyptic number.

23768739639 is a deficient number, since it is larger than the sum of its proper divisors (10563884297).

23768739639 is a wasteful number, since it uses less digits than its factorization.

23768739639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640971077 (or 2640971074 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 63.

The spelling of 23768739639 in words is "twenty-three billion, seven hundred sixty-eight million, seven hundred thirty-nine thousand, six hundred thirty-nine".