128670305631 has 16 divisors (see below), whose sum is σ = 206388460800. Its totient is φ = 69656105088.

The previous prime is 128670305629. The next prime is 128670305633. The reversal of 128670305631 is 136503076821.

It is an interprime number because it is at equal distance from previous prime (128670305629) and next prime (128670305633).

It is not a de Polignac number, because 128670305631 - 2¹ = 128670305629 is a prime.

It is a super-2 number, since 2×128670305631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128670305633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161240586 + ... + 161241383.

It is an arithmetic number, because the mean of its divisors is an integer number (12899278800).

Almost surely, 2^128670305631 is an apocalyptic number.

128670305631 is a deficient number, since it is larger than the sum of its proper divisors (77718155169).

128670305631 is a wasteful number, since it uses less digits than its factorization.

128670305631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322481998.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 128670305631 in words is "one hundred twenty-eight billion, six hundred seventy million, three hundred five thousand, six hundred thirty-one".