72891015673365 has 24 divisors (see below), whose sum is σ = 126350163733248. Its totient is φ = 38873443261920.

The previous prime is 72891015673361. The next prime is 72891015673447. The reversal of 72891015673365 is 56337651019827.

72891015673365 is a `hidden beast` number, since 7 + 2 + 8 + 9 + 1 + 0 + 1 + 567 + 3 + 3 + 65 = 666.

It is not a de Polignac number, because 72891015673365 - 2² = 72891015673361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72891015673361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35770449 + ... + 37753238.

It is an arithmetic number, because the mean of its divisors is an integer number (5264590155552).

Almost surely, 2^{72891015673365} is an apocalyptic number.

It is an amenable number.

72891015673365 is a deficient number, since it is larger than the sum of its proper divisors (53459148059883).

72891015673365 is a wasteful number, since it uses less digits than its factorization.

72891015673365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73545729 (or 73545726 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 72891015673365 in words is "seventy-two trillion, eight hundred ninety-one billion, fifteen million, six hundred seventy-three thousand, three hundred sixty-five".