861816576 has 36 divisors (see below), whose sum is σ = 2293690952. Its totient is φ = 287271936.

The previous prime is 861816563. The next prime is 861816587. The reversal of 861816576 is 675618168.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 560311 + ... + 561846.

Almost surely, 2^861816576 is an apocalyptic number.

It is an amenable number.

861816576 is an abundant number, since it is smaller than the sum of its proper divisors (1431874376).

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

861816576 is a wasteful number, since it uses less digits than its factorization.

861816576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122176 (or 1122162 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 861816576 is about 29356.7126224991. The cubic root of 861816576 is about 951.6376466229.

The spelling of 861816576 in words is "eight hundred sixty-one million, eight hundred sixteen thousand, five hundred seventy-six".