72764813851 has 4 divisors (see below), whose sum is σ = 72771279912. Its totient is φ = 72758347792.

The previous prime is 72764813813. The next prime is 72764813881. The reversal of 72764813851 is 15831846727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15831846727 = 3373 ⋅4693699.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72764813851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72764813881) 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 3 ways as a sum of consecutive naturals, for example, 3216121 + ... + 3238666.

It is an arithmetic number, because the mean of its divisors is an integer number (18192819978).

Almost surely, 2^72764813851 is an apocalyptic number.

72764813851 is a deficient number, since it is larger than the sum of its proper divisors (6466061).

72764813851 is a wasteful number, since it uses less digits than its factorization.

72764813851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6466060.

The product of its digits is 2257920, while the sum is 52.

The spelling of 72764813851 in words is "seventy-two billion, seven hundred sixty-four million, eight hundred thirteen thousand, eight hundred fifty-one".