72857143658 has 32 divisors (see below), whose sum is σ = 119948487120. Its totient is φ = 32987865600.

The previous prime is 72857143649. The next prime is 72857143687. The reversal of 72857143658 is 85634175827.

It can be written as a sum of positive squares in 8 ways, for example, as 60430913929 + 12426229729 = 245827^2 + 111473^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158966 + ... + 413502.

Almost surely, 2^72857143658 is an apocalyptic number.

72857143658 is a deficient number, since it is larger than the sum of its proper divisors (47091343462).

72857143658 is a wasteful number, since it uses less digits than its factorization.

72857143658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254762.

The product of its digits is 11289600, while the sum is 56.

The spelling of 72857143658 in words is "seventy-two billion, eight hundred fifty-seven million, one hundred forty-three thousand, six hundred fifty-eight".