172615500401 has 4 divisors (see below), whose sum is σ = 175046704704. Its totient is φ = 170184296100.

The previous prime is 172615500391. The next prime is 172615500413. The reversal of 172615500401 is 104005516271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104005516271 = 127 ⋅818941073.

It is a cyclic number.

It is not a de Polignac number, because 172615500401 - 2³⁴ = 155435631217 is a prime.

It is a super-2 number, since 2×172615500401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172615500901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215602045 + ... + 1215602186.

It is an arithmetic number, because the mean of its divisors is an integer number (43761676176).

Almost surely, 2^172615500401 is an apocalyptic number.

It is an amenable number.

172615500401 is a deficient number, since it is larger than the sum of its proper divisors (2431204303).

172615500401 is an equidigital number, since it uses as much as digits as its factorization.

172615500401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431204302.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 172615500401 in words is "one hundred seventy-two billion, six hundred fifteen million, five hundred thousand, four hundred one".