861899280568 has 16 divisors (see below), whose sum is σ = 1616097458160. Its totient is φ = 430939958400.

The previous prime is 861899280559. The next prime is 861899280629. The reversal of 861899280568 is 865082998168.

It is a junction number, because it is equal to n+sod(n) for n = 861899280497 and 861899280506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824668 + ... + 1550443.

It is an arithmetic number, because the mean of its divisors is an integer number (101006091135).

Almost surely, 2^861899280568 is an apocalyptic number.

It is an amenable number.

861899280568 is a deficient number, since it is larger than the sum of its proper divisors (754198177592).

861899280568 is a wasteful number, since it uses less digits than its factorization.

861899280568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420478 (or 2420474 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 70.

The spelling of 861899280568 in words is "eight hundred sixty-one billion, eight hundred ninety-nine million, two hundred eighty thousand, five hundred sixty-eight".