172720454319 has 36 divisors (see below), whose sum is σ = 298061102664. Its totient is φ = 96029896032.

The previous prime is 172720454299. The next prime is 172720454327. The reversal of 172720454319 is 913454027271.

172720454319 is a `hidden beast` number, since 1 + 7 + 2 + 7 + 204 + 5 + 431 + 9 = 666.

It is not a de Polignac number, because 172720454319 - 2¹² = 172720450223 is a prime.

It is a super-2 number, since 2×172720454319² (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 (172720454719) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5276337 + ... + 5308970.

It is an arithmetic number, because the mean of its divisors is an integer number (8279475074).

Almost surely, 2^172720454319 is an apocalyptic number.

172720454319 is a deficient number, since it is larger than the sum of its proper divisors (125340648345).

172720454319 is a wasteful number, since it uses less digits than its factorization.

172720454319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585364 (or 10585354 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 172720454319 in words is "one hundred seventy-two billion, seven hundred twenty million, four hundred fifty-four thousand, three hundred nineteen".