72556540312 has 32 divisors (see below), whose sum is σ = 140085388800. Its totient is φ = 35205560064.

The previous prime is 72556540261. The next prime is 72556540351. The reversal of 72556540312 is 21304565527.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 206637 + ... + 433372.

It is an arithmetic number, because the mean of its divisors is an integer number (4377668400).

Almost surely, 2^72556540312 is an apocalyptic number.

It is an amenable number.

72556540312 is a deficient number, since it is larger than the sum of its proper divisors (67528848488).

72556540312 is a wasteful number, since it uses less digits than its factorization.

72556540312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640435 (or 640431 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 72556540312 in words is "seventy-two billion, five hundred fifty-six million, five hundred forty thousand, three hundred twelve".