172369680720 has 80 divisors (see below), whose sum is σ = 534733965312. Its totient is φ = 45931875840.

The previous prime is 172369680709. The next prime is 172369680727. The reversal of 172369680720 is 27086963271.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×172369680720² (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 (172369680727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71409 + ... + 591471.

Almost surely, 2^172369680720 is an apocalyptic number.

172369680720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172369680720 is an abundant number, since it is smaller than the sum of its proper divisors (362364284592).

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

172369680720 is a wasteful number, since it uses less digits than its factorization.

172369680720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521460 (or 521454 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 172369680720 in words is "one hundred seventy-two billion, three hundred sixty-nine million, six hundred eighty thousand, seven hundred twenty".