72057210823 has 4 divisors (see below), whose sum is σ = 77600073208. Its totient is φ = 66514348440.

The previous prime is 72057210817. The next prime is 72057210829. The reversal of 72057210823 is 32801275027.

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

It is an interprime number because it is at equal distance from previous prime (72057210817) and next prime (72057210829).

It is a cyclic number.

It is not a de Polignac number, because 72057210823 - 2¹⁷ = 72057079751 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 (72057210829) 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, 2771431173 + ... + 2771431198.

It is an arithmetic number, because the mean of its divisors is an integer number (19400018302).

Almost surely, 2^72057210823 is an apocalyptic number.

72057210823 is a deficient number, since it is larger than the sum of its proper divisors (5542862385).

72057210823 is a wasteful number, since it uses less digits than its factorization.

72057210823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542862384.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 72057210823 in words is "seventy-two billion, fifty-seven million, two hundred ten thousand, eight hundred twenty-three".