72507065570 has 16 divisors (see below), whose sum is σ = 131979154680. Its totient is φ = 28676951424.

The previous prime is 72507065539. The next prime is 72507065591. The reversal of 72507065570 is 7556070527.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31932617809 + 40574447761 = 178697^2 + 201431^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40733417 + ... + 40735196.

Almost surely, 2^72507065570 is an apocalyptic number.

72507065570 is a deficient number, since it is larger than the sum of its proper divisors (59472089110).

72507065570 is a wasteful number, since it uses less digits than its factorization.

72507065570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81468709.

The product of its (nonzero) digits is 514500, while the sum is 44.

The spelling of 72507065570 in words is "seventy-two billion, five hundred seven million, sixty-five thousand, five hundred seventy".