172051715020 has 24 divisors (see below), whose sum is σ = 361318003200. Its totient is φ = 68818895232.

The previous prime is 172051714997. The next prime is 172051715041. The reversal of 172051715020 is 20517150271.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 898296 + ... + 1072864.

It is an arithmetic number, because the mean of its divisors is an integer number (15054916800).

Almost surely, 2^172051715020 is an apocalyptic number.

172051715020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172051715020 is an abundant number, since it is smaller than the sum of its proper divisors (189266288180).

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

172051715020 is a wasteful number, since it uses less digits than its factorization.

172051715020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223857 (or 223855 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

Adding to 172051715020 its reverse (20517150271), we get a palindrome (192568865291).

The spelling of 172051715020 in words is "one hundred seventy-two billion, fifty-one million, seven hundred fifteen thousand, twenty".