861882026444 has 24 divisors (see below), whose sum is σ = 1597613603040. Its totient is φ = 405439946496.

The previous prime is 861882026429. The next prime is 861882026449. The reversal of 861882026444 is 444620288168.

It is not an unprimeable number, because it can be changed into a prime (861882026449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185304 + ... + 2549375.

It is an arithmetic number, because the mean of its divisors is an integer number (66567233460).

Almost surely, 2^861882026444 is an apocalyptic number.

It is an amenable number.

861882026444 is a deficient number, since it is larger than the sum of its proper divisors (735731576596).

861882026444 is a wasteful number, since it uses less digits than its factorization.

861882026444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737377 (or 4737375 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 53.

The spelling of 861882026444 in words is "eight hundred sixty-one billion, eight hundred eighty-two million, twenty-six thousand, four hundred forty-four".