197445691694856 has 64 divisors (see below), whose sum is σ = 539421505692480. Its totient is φ = 59728332718080.

The previous prime is 197445691694833. The next prime is 197445691694873. The reversal of 197445691694856 is 658496196544791.

It is a super-2 number, since 2×197445691694856² (a number of 29 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, 647941561 + ... + 648246216.

It is an arithmetic number, because the mean of its divisors is an integer number (8428461026445).

Almost surely, 2^{197445691694856} is an apocalyptic number.

It is an amenable number.

197445691694856 is an abundant number, since it is smaller than the sum of its proper divisors (341975813997624).

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

197445691694856 is a wasteful number, since it uses less digits than its factorization.

197445691694856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296188374 (or 1296188370 counting only the distinct ones).

The product of its digits is 14108774400, while the sum is 84.

The spelling of 197445691694856 in words is "one hundred ninety-seven trillion, four hundred forty-five billion, six hundred ninety-one million, six hundred ninety-four thousand, eight hundred fifty-six".