72651570 has 32 divisors (see below), whose sum is σ = 174588480. Its totient is φ = 19348800.

The previous prime is 72651563. The next prime is 72651617. The reversal of 72651570 is 7515627.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42696 + ... + 44364.

It is an arithmetic number, because the mean of its divisors is an integer number (5455890).

Almost surely, 2^72651570 is an apocalyptic number.

72651570 is an abundant number, since it is smaller than the sum of its proper divisors (101936910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72651570 is a wasteful number, since it uses less digits than its factorization.

72651570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 72651570 is about 8523.5890327960. The cubic root of 72651570 is about 417.2679241351.

The spelling of 72651570 in words is "seventy-two million, six hundred fifty-one thousand, five hundred seventy".