72783562865 has 32 divisors (see below), whose sum is σ = 99071347200. Its totient is φ = 50887077120.

The previous prime is 72783562861. The next prime is 72783562879. The reversal of 72783562865 is 56826538727.

It is a happy number.

It is not a de Polignac number, because 72783562865 - 2² = 72783562861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72783562861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2043560 + ... + 2078870.

It is an arithmetic number, because the mean of its divisors is an integer number (3095979600).

Almost surely, 2^72783562865 is an apocalyptic number.

It is an amenable number.

72783562865 is a deficient number, since it is larger than the sum of its proper divisors (26287784335).

72783562865 is a wasteful number, since it uses less digits than its factorization.

72783562865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37017.

The product of its digits is 33868800, while the sum is 59.

The spelling of 72783562865 in words is "seventy-two billion, seven hundred eighty-three million, five hundred sixty-two thousand, eight hundred sixty-five".