2172908370465 has 144 divisors (see below), whose sum is σ = 4567375088640. Its totient is φ = 988123691520.

The previous prime is 2172908370349. The next prime is 2172908370481. The reversal of 2172908370465 is 5640738092712.

It is a happy number.

2172908370465 is a `hidden beast` number, since 2 + 17 + 2 + 90 + 83 + 7 + 0 + 465 = 666.

It is not a de Polignac number, because 2172908370465 - 2²⁰ = 2172907321889 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11275641 + ... + 11466729.

It is an arithmetic number, because the mean of its divisors is an integer number (31717882560).

It is a 1-persistent number, because it is pandigital, but 2⋅2172908370465 = 4345816740930 is not.

Almost surely, 2^{2172908370465} is an apocalyptic number.

It is an amenable number.

2172908370465 is an abundant number, since it is smaller than the sum of its proper divisors (2394466718175).

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

2172908370465 is a wasteful number, since it uses less digits than its factorization.

2172908370465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191314 (or 191295 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 2172908370465 in words is "two trillion, one hundred seventy-two billion, nine hundred eight million, three hundred seventy thousand, four hundred sixty-five".