172918902046 has 32 divisors (see below), whose sum is σ = 283850137728. Its totient is φ = 78352067040.

The previous prime is 172918902041. The next prime is 172918902083. The reversal of 172918902046 is 640209819271.

It is a super-2 number, since 2×172918902046² (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 (172918902041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11814585 + ... + 11829211.

It is an arithmetic number, because the mean of its divisors is an integer number (8870316804).

Almost surely, 2^172918902046 is an apocalyptic number.

172918902046 is a deficient number, since it is larger than the sum of its proper divisors (110931235682).

172918902046 is a wasteful number, since it uses less digits than its factorization.

172918902046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16296.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 172918902046 in words is "one hundred seventy-two billion, nine hundred eighteen million, nine hundred two thousand, forty-six".