72857760765 has 32 divisors (see below), whose sum is σ = 117472747392. Its totient is φ = 38558304000.

The previous prime is 72857760737. The next prime is 72857760793. The reversal of 72857760765 is 56706775827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72857760737) and next prime (72857760793).

It is not a de Polignac number, because 72857760765 - 2¹⁷ = 72857629693 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72857760699 and 72857760708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1222510 + ... + 1280720.

It is an arithmetic number, because the mean of its divisors is an integer number (3671023356).

Almost surely, 2^72857760765 is an apocalyptic number.

It is an amenable number.

72857760765 is a deficient number, since it is larger than the sum of its proper divisors (44614986627).

72857760765 is a wasteful number, since it uses less digits than its factorization.

72857760765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58861.

The product of its (nonzero) digits is 34574400, while the sum is 60.

The spelling of 72857760765 in words is "seventy-two billion, eight hundred fifty-seven million, seven hundred sixty thousand, seven hundred sixty-five".