72559769851 has 4 divisors (see below), whose sum is σ = 72603561352. Its totient is φ = 72515978352.

The previous prime is 72559769831. The next prime is 72559769861. The reversal of 72559769851 is 15896795527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72559769851 - 2²⁹ = 72022898939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72559769831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21893265 + ... + 21896578.

It is an arithmetic number, because the mean of its divisors is an integer number (18150890338).

Almost surely, 2^72559769851 is an apocalyptic number.

72559769851 is a deficient number, since it is larger than the sum of its proper divisors (43791501).

72559769851 is a wasteful number, since it uses less digits than its factorization.

72559769851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43791500.

The product of its digits is 47628000, while the sum is 64.

The spelling of 72559769851 in words is "seventy-two billion, five hundred fifty-nine million, seven hundred sixty-nine thousand, eight hundred fifty-one".