72031316353517 has 16 divisors (see below), whose sum is σ = 78705119097600. Its totient is φ = 65693385599040.

The previous prime is 72031316353483. The next prime is 72031316353519. The reversal of 72031316353517 is 71535361313027.

It is a cyclic number.

It is not a de Polignac number, because 72031316353517 - 2⁸ = 72031316353261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72031316353519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661110842 + ... + 661219787.

It is an arithmetic number, because the mean of its divisors is an integer number (4919069943600).

Almost surely, 2^{72031316353517} is an apocalyptic number.

It is an amenable number.

72031316353517 is a deficient number, since it is larger than the sum of its proper divisors (6673802744083).

72031316353517 is a wasteful number, since it uses less digits than its factorization.

72031316353517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322330756.

The product of its (nonzero) digits is 1190700, while the sum is 47.

The spelling of 72031316353517 in words is "seventy-two trillion, thirty-one billion, three hundred sixteen million, three hundred fifty-three thousand, five hundred seventeen".