172890387274 has 64 divisors (see below), whose sum is σ = 292082402304. Its totient is φ = 76071600000.

The previous prime is 172890387227. The next prime is 172890387281. The reversal of 172890387274 is 472783098271.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67772299 + ... + 67774849.

It is an arithmetic number, because the mean of its divisors is an integer number (4563787536).

Almost surely, 2^172890387274 is an apocalyptic number.

172890387274 is a deficient number, since it is larger than the sum of its proper divisors (119192015030).

172890387274 is a wasteful number, since it uses less digits than its factorization.

172890387274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 172890387274 in words is "one hundred seventy-two billion, eight hundred ninety million, three hundred eighty-seven thousand, two hundred seventy-four".