72531465511 has 4 divisors (see below), whose sum is σ = 72532746000. Its totient is φ = 72530185024.

The previous prime is 72531465509. The next prime is 72531465521. The reversal of 72531465511 is 11556413527.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72531465511 - 2¹ = 72531465509 is a prime.

It is a super-2 number, since 2×72531465511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72531465521) 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, 551146 + ... + 669943.

It is an arithmetic number, because the mean of its divisors is an integer number (18133186500).

Almost surely, 2^72531465511 is an apocalyptic number.

72531465511 is a deficient number, since it is larger than the sum of its proper divisors (1280489).

72531465511 is a wasteful number, since it uses less digits than its factorization.

72531465511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280488.

The product of its digits is 126000, while the sum is 40.

The spelling of 72531465511 in words is "seventy-two billion, five hundred thirty-one million, four hundred sixty-five thousand, five hundred eleven".