128971172610 has 48 divisors (see below), whose sum is σ = 383228629056. Its totient is φ = 29479125024.

The previous prime is 128971172557. The next prime is 128971172633. The reversal of 128971172610 is 16271179821.

It is a happy number.

128971172610 is a `hidden beast` number, since 1 + 28 + 9 + 7 + 1 + 1 + 7 + 2 + 610 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102357444 + ... + 102358703.

It is an arithmetic number, because the mean of its divisors is an integer number (7983929772).

Almost surely, 2^128971172610 is an apocalyptic number.

128971172610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128971172610 is an abundant number, since it is smaller than the sum of its proper divisors (254257456446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128971172610 is a wasteful number, since it uses less digits than its factorization.

128971172610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204716167 (or 204716164 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 45.

The spelling of 128971172610 in words is "one hundred twenty-eight billion, nine hundred seventy-one million, one hundred seventy-two thousand, six hundred ten".