72857151508 has 12 divisors (see below), whose sum is σ = 129905676180. Its totient is φ = 35741244032.

The previous prime is 72857151487. The next prime is 72857151517. The reversal of 72857151508 is 80515175827.

It can be written as a sum of positive squares in 2 ways, for example, as 17237589264 + 55619562244 = 131292^2 + 235838^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171832693 + ... + 171833116.

It is an arithmetic number, because the mean of its divisors is an integer number (10825473015).

Almost surely, 2^72857151508 is an apocalyptic number.

It is an amenable number.

72857151508 is a deficient number, since it is larger than the sum of its proper divisors (57048524672).

72857151508 is a wasteful number, since it uses less digits than its factorization.

72857151508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343665866 (or 343665864 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 49.

The spelling of 72857151508 in words is "seventy-two billion, eight hundred fifty-seven million, one hundred fifty-one thousand, five hundred eight".