172157002066020 has 48 divisors (see below), whose sum is σ = 507410111355840. Its totient is φ = 43492295258496.

The previous prime is 172157002066003. The next prime is 172157002066097. The reversal of 172157002066020 is 20660200751271.

It is a super-2 number, since 2×172157002066020² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172157002066020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75507455907 + ... + 75507458186.

It is an arithmetic number, because the mean of its divisors is an integer number (10571043986580).

Almost surely, 2^{172157002066020} is an apocalyptic number.

172157002066020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172157002066020 is an abundant number, since it is smaller than the sum of its proper divisors (335253109289820).

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

172157002066020 is a wasteful number, since it uses less digits than its factorization.

172157002066020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151014914124 (or 151014914122 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 172157002066020 in words is "one hundred seventy-two trillion, one hundred fifty-seven billion, two million, sixty-six thousand, twenty".