72651616 has 24 divisors (see below), whose sum is σ = 143688384. Its totient is φ = 36159360.

The previous prime is 72651563. The next prime is 72651617. The reversal of 72651616 is 61615627.

It is a happy number.

It is a super-2 number, since 2×72651616² = 10556514614822912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72651617) 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, 2046 + ... + 12226.

It is an arithmetic number, because the mean of its divisors is an integer number (5987016).

Almost surely, 2^72651616 is an apocalyptic number.

It is an amenable number.

72651616 is a deficient number, since it is larger than the sum of its proper divisors (71036768).

72651616 is a wasteful number, since it uses less digits than its factorization.

72651616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414 (or 10406 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 72651616 is about 8523.5917311894. The cubic root of 72651616 is about 417.2680122008.

The spelling of 72651616 in words is "seventy-two million, six hundred fifty-one thousand, six hundred sixteen".