72805620365 has 16 divisors (see below), whose sum is σ = 91173351168. Its totient is φ = 55707206016.

The previous prime is 72805620361. The next prime is 72805620397. The reversal of 72805620365 is 56302650827.

It is a cyclic number.

It is not a de Polignac number, because 72805620365 - 2² = 72805620361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72805620361) 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 15 ways as a sum of consecutive naturals, for example, 1793129 + ... + 1833281.

It is an arithmetic number, because the mean of its divisors is an integer number (5698334448).

Almost surely, 2^72805620365 is an apocalyptic number.

It is an amenable number.

72805620365 is a deficient number, since it is larger than the sum of its proper divisors (18367730803).

72805620365 is a wasteful number, since it uses less digits than its factorization.

72805620365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55948.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 72805620365 in words is "seventy-two billion, eight hundred five million, six hundred twenty thousand, three hundred sixty-five".