128023686031 has 2 divisors, whose sum is σ = 128023686032. Its totient is φ = 128023686030.

The previous prime is 128023686023. The next prime is 128023686059. The reversal of 128023686031 is 130686320821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128023686031 - 2³ = 128023686023 is a prime.

It is a super-2 number, since 2×128023686031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128023686061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64011843015 + 64011843016.

It is an arithmetic number, because the mean of its divisors is an integer number (64011843016).

Almost surely, 2^128023686031 is an apocalyptic number.

128023686031 is a deficient number, since it is larger than the sum of its proper divisors (1).

128023686031 is an equidigital number, since it uses as much as digits as its factorization.

128023686031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 128023686031 in words is "one hundred twenty-eight billion, twenty-three million, six hundred eighty-six thousand, thirty-one".