172426503321 has 6 divisors (see below), whose sum is σ = 249060504810. Its totient is φ = 114951002208.

The previous prime is 172426503317. The next prime is 172426503341. The reversal of 172426503321 is 123305624271.

172426503321 is a `hidden beast` number, since 1 + 72 + 4 + 265 + 0 + 3 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128496439296 + 43930064025 = 358464^2 + 209595^2 .

It is not a de Polignac number, because 172426503321 - 2² = 172426503317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172426503341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9579250176 + ... + 9579250193.

It is an arithmetic number, because the mean of its divisors is an integer number (41510084135).

Almost surely, 2^172426503321 is an apocalyptic number.

It is an amenable number.

172426503321 is a deficient number, since it is larger than the sum of its proper divisors (76634001489).

172426503321 is a wasteful number, since it uses less digits than its factorization.

172426503321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19158500375 (or 19158500372 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 172426503321 in words is "one hundred seventy-two billion, four hundred twenty-six million, five hundred three thousand, three hundred twenty-one".