72611539937 has 4 divisors (see below), whose sum is σ = 72618905856. Its totient is φ = 72604174020.

The previous prime is 72611539933. The next prime is 72611539967. The reversal of 72611539937 is 73993511627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72611539937 - 2² = 72611539933 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72611539933) 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, 3668153 + ... + 3687894.

It is an arithmetic number, because the mean of its divisors is an integer number (18154726464).

Almost surely, 2^72611539937 is an apocalyptic number.

It is an amenable number.

72611539937 is a deficient number, since it is larger than the sum of its proper divisors (7365919).

72611539937 is an equidigital number, since it uses as much as digits as its factorization.

72611539937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365918.

The product of its digits is 2143260, while the sum is 53.

The spelling of 72611539937 in words is "seventy-two billion, six hundred eleven million, five hundred thirty-nine thousand, nine hundred thirty-seven".