861447876432 has 160 divisors (see below), whose sum is σ = 2768256570240. Its totient is φ = 226790031360.

The previous prime is 861447876427. The next prime is 861447876439. The reversal of 861447876432 is 234678744168.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861447876439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3574557 + ... + 3807932.

It is an arithmetic number, because the mean of its divisors is an integer number (17301603564).

Almost surely, 2^861447876432 is an apocalyptic number.

It is an amenable number.

861447876432 is an abundant number, since it is smaller than the sum of its proper divisors (1906808693808).

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

861447876432 is a wasteful number, since it uses less digits than its factorization.

861447876432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382541 (or 7382535 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 60.

The spelling of 861447876432 in words is "eight hundred sixty-one billion, four hundred forty-seven million, eight hundred seventy-six thousand, four hundred thirty-two".