861797195122 has 16 divisors (see below), whose sum is σ = 1303280732160. Its totient is φ = 427372400448.

The previous prime is 861797195087. The next prime is 861797195137. The reversal of 861797195122 is 221591797168.

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, 289779 + ... + 1344457.

It is an arithmetic number, because the mean of its divisors is an integer number (81455045760).

Almost surely, 2^861797195122 is an apocalyptic number.

861797195122 is a deficient number, since it is larger than the sum of its proper divisors (441483537038).

861797195122 is a wasteful number, since it uses less digits than its factorization.

861797195122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058025.

The product of its digits is 3810240, while the sum is 58.

The spelling of 861797195122 in words is "eight hundred sixty-one billion, seven hundred ninety-seven million, one hundred ninety-five thousand, one hundred twenty-two".