72556978759 has 16 divisors (see below), whose sum is σ = 74179491840. Its totient is φ = 70948444320.

The previous prime is 72556978721. The next prime is 72556978771. The reversal of 72556978759 is 95787965527.

It is a cyclic number.

It is not a de Polignac number, because 72556978759 - 2¹¹ = 72556976711 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 (72556978709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10821202 + ... + 10827904.

It is an arithmetic number, because the mean of its divisors is an integer number (4636218240).

Almost surely, 2^72556978759 is an apocalyptic number.

72556978759 is a deficient number, since it is larger than the sum of its proper divisors (1622513081).

72556978759 is a wasteful number, since it uses less digits than its factorization.

72556978759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710.

The product of its digits is 333396000, while the sum is 70.

The spelling of 72556978759 in words is "seventy-two billion, five hundred fifty-six million, nine hundred seventy-eight thousand, seven hundred fifty-nine".