72390939269 has 4 divisors (see below), whose sum is σ = 78971933760. Its totient is φ = 65809944780.

The previous prime is 72390939263. The next prime is 72390939311. The reversal of 72390939269 is 96293909327.

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 72390939269 - 2¹⁶ = 72390873733 is a prime.

It is a super-2 number, since 2×72390939269² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72390939263) 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, 3290497229 + ... + 3290497250.

It is an arithmetic number, because the mean of its divisors is an integer number (19742983440).

Almost surely, 2^72390939269 is an apocalyptic number.

It is an amenable number.

72390939269 is a deficient number, since it is larger than the sum of its proper divisors (6580994491).

72390939269 is a wasteful number, since it uses less digits than its factorization.

72390939269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6580994490.

The product of its (nonzero) digits is 9920232, while the sum is 59.

The spelling of 72390939269 in words is "seventy-two billion, three hundred ninety million, nine hundred thirty-nine thousand, two hundred sixty-nine".