172129607390 has 64 divisors (see below), whose sum is σ = 336976960320. Its totient is φ = 62925880320.

The previous prime is 172129607389. The next prime is 172129607509. The reversal of 172129607390 is 93706921271.

It is a super-2 number, since 2×172129607390² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 23476025 + ... + 23483355.

It is an arithmetic number, because the mean of its divisors is an integer number (5265265005).

Almost surely, 2^172129607390 is an apocalyptic number.

172129607390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172129607390 is a deficient number, since it is larger than the sum of its proper divisors (164847352930).

172129607390 is a wasteful number, since it uses less digits than its factorization.

172129607390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9117.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 172129607390 in words is "one hundred seventy-two billion, one hundred twenty-nine million, six hundred seven thousand, three hundred ninety".