72530475891 has 8 divisors (see below), whose sum is σ = 96737620224. Its totient is φ = 48338491080.

The previous prime is 72530475889. The next prime is 72530475923. The reversal of 72530475891 is 19857403527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72530475891 - 2¹ = 72530475889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72530475881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778711 + ... + 3797856.

It is an arithmetic number, because the mean of its divisors is an integer number (12092202528).

Almost surely, 2^72530475891 is an apocalyptic number.

72530475891 is a deficient number, since it is larger than the sum of its proper divisors (24207144333).

72530475891 is a wasteful number, since it uses less digits than its factorization.

72530475891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579761.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 72530475891 in words is "seventy-two billion, five hundred thirty million, four hundred seventy-five thousand, eight hundred ninety-one".