86728556772 has 108 divisors (see below), whose sum is σ = 259508895100. Its totient is φ = 24259720320.

The previous prime is 86728556771. The next prime is 86728556809. The reversal of 86728556772 is 27765582768.

86728556772 is a `hidden beast` number, since 8 + 6 + 7 + 2 + 8 + 556 + 7 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40548265956 + 46180290816 = 201366^2 + 214896^2 .

It is not an unprimeable number, because it can be changed into a prime (86728556771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 709147 + ... + 822402.

Almost surely, 2^86728556772 is an apocalyptic number.

It is an amenable number.

86728556772 is an abundant number, since it is smaller than the sum of its proper divisors (172780338328).

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

86728556772 is a wasteful number, since it uses less digits than its factorization.

86728556772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531594 (or 1531578 counting only the distinct ones).

The product of its digits is 79027200, while the sum is 63.

The spelling of 86728556772 in words is "eighty-six billion, seven hundred twenty-eight million, five hundred fifty-six thousand, seven hundred seventy-two".