72672511 has 4 divisors (see below), whose sum is σ = 76497400. Its totient is φ = 68847624.

The previous prime is 72672493. The next prime is 72672517. The reversal of 72672511 is 11527627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11527627 = 1279 ⋅9013.

It is a cyclic number.

It is not a de Polignac number, because 72672511 - 2²¹ = 70575359 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 (72672517) 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, 1912416 + ... + 1912453.

It is an arithmetic number, because the mean of its divisors is an integer number (19124350).

Almost surely, 2^72672511 is an apocalyptic number.

72672511 is a deficient number, since it is larger than the sum of its proper divisors (3824889).

72672511 is a wasteful number, since it uses less digits than its factorization.

72672511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824888.

The product of its digits is 5880, while the sum is 31.

The square root of 72672511 is about 8524.8173587473. The cubic root of 72672511 is about 417.3080112165.

It can be divided in two parts, 726 and 72511, that added together give a palindrome (73237).

The spelling of 72672511 in words is "seventy-two million, six hundred seventy-two thousand, five hundred eleven".