172128680401420 has 48 divisors (see below), whose sum is σ = 373940486236800. Its totient is φ = 66476258266880.

The previous prime is 172128680401399. The next prime is 172128680401429. The reversal of 172128680401420 is 24104086821271.

It is a super-2 number, since 2×172128680401420² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172128680401429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35902125 + ... + 40413115.

It is an arithmetic number, because the mean of its divisors is an integer number (7790426796600).

Almost surely, 2^{172128680401420} is an apocalyptic number.

172128680401420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172128680401420 is an abundant number, since it is smaller than the sum of its proper divisors (201811805835380).

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

172128680401420 is a wasteful number, since it uses less digits than its factorization.

172128680401420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576818 (or 4576816 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 172128680401420 in words is "one hundred seventy-two trillion, one hundred twenty-eight billion, six hundred eighty million, four hundred one thousand, four hundred twenty".