172311026078 has 4 divisors (see below), whose sum is σ = 258466539120. Its totient is φ = 86155513038.

The previous prime is 172311026033. The next prime is 172311026099. The reversal of 172311026078 is 870620113271.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43077756518 + ... + 43077756521.

It is an arithmetic number, because the mean of its divisors is an integer number (64616634780).

Almost surely, 2^172311026078 is an apocalyptic number.

172311026078 is a deficient number, since it is larger than the sum of its proper divisors (86155513042).

172311026078 is an equidigital number, since it uses as much as digits as its factorization.

172311026078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86155513041.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 172311026078 in words is "one hundred seventy-two billion, three hundred eleven million, twenty-six thousand, seventy-eight".