861903503016 has 64 divisors (see below), whose sum is σ = 2320915238400. Its totient is φ = 265850278848.

The previous prime is 861903502961. The next prime is 861903503023. The reversal of 861903503016 is 610305309168.

It is a happy number.

It is a super-2 number, since 2×861903503016² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21958756 + ... + 21997971.

It is an arithmetic number, because the mean of its divisors is an integer number (36264300600).

Almost surely, 2^861903503016 is an apocalyptic number.

861903503016 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

861903503016 is an abundant number, since it is smaller than the sum of its proper divisors (1459011735384).

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

861903503016 is a wasteful number, since it uses less digits than its factorization.

861903503016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43956798 (or 43956794 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 861903503016 in words is "eight hundred sixty-one billion, nine hundred three million, five hundred three thousand, sixteen".