72610551 has 12 divisors (see below), whose sum is σ = 112949928. Its totient is φ = 44683344.

The previous prime is 72610547. The next prime is 72610567. The reversal of 72610551 is 15501627.

It is not a de Polignac number, because 72610551 - 2² = 72610547 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72610511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310185 + ... + 310418.

It is an arithmetic number, because the mean of its divisors is an integer number (9412494).

Almost surely, 2^72610551 is an apocalyptic number.

72610551 is a deficient number, since it is larger than the sum of its proper divisors (40339377).

72610551 is a wasteful number, since it uses less digits than its factorization.

72610551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620622 (or 620619 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 72610551 is about 8521.1824883639. The cubic root of 72610551 is about 417.1893796742.

The spelling of 72610551 in words is "seventy-two million, six hundred ten thousand, five hundred fifty-one".