172076867838 has 96 divisors (see below), whose sum is σ = 388150963200. Its totient is φ = 55054329408.

The previous prime is 172076867821. The next prime is 172076867839. The reversal of 172076867838 is 838768670271.

It is a super-2 number, since 2×172076867838² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172076867839) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21908320 + ... + 21916172.

It is an arithmetic number, because the mean of its divisors is an integer number (4043239200).

Almost surely, 2^172076867838 is an apocalyptic number.

172076867838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

172076867838 is an abundant number, since it is smaller than the sum of its proper divisors (216074095362).

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

172076867838 is a wasteful number, since it uses less digits than its factorization.

172076867838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406 (or 8403 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 63.

The spelling of 172076867838 in words is "one hundred seventy-two billion, seventy-six million, eight hundred sixty-seven thousand, eight hundred thirty-eight".