172616061731 has 4 divisors (see below), whose sum is σ = 176630388792. Its totient is φ = 168601734672.

The previous prime is 172616061707. The next prime is 172616061763. The reversal of 172616061731 is 137160616271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172616061731 - 2²⁶ = 172548952867 is a prime.

It is a super-2 number, since 2×172616061731² (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 (172616061781) 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, 2007163466 + ... + 2007163551.

It is an arithmetic number, because the mean of its divisors is an integer number (44157597198).

Almost surely, 2^172616061731 is an apocalyptic number.

172616061731 is a deficient number, since it is larger than the sum of its proper divisors (4014327061).

172616061731 is an equidigital number, since it uses as much as digits as its factorization.

172616061731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014327060.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 172616061731 in words is "one hundred seventy-two billion, six hundred sixteen million, sixty-one thousand, seven hundred thirty-one".