861198590208 has 72 divisors (see below), whose sum is σ = 2500411840416. Its totient is φ = 260969267200.

The previous prime is 861198590143. The next prime is 861198590227. The reversal of 861198590208 is 802095891168.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50962113 + ... + 50979008.

It is an arithmetic number, because the mean of its divisors is an integer number (34727942228).

Almost surely, 2^861198590208 is an apocalyptic number.

861198590208 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

861198590208 is an abundant number, since it is smaller than the sum of its proper divisors (1639213250208).

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

861198590208 is a wasteful number, since it uses less digits than its factorization.

861198590208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101941151 (or 101941137 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 57.

The spelling of 861198590208 in words is "eight hundred sixty-one billion, one hundred ninety-eight million, five hundred ninety thousand, two hundred eight".