197981237015680 has 64 divisors (see below), whose sum is σ = 473505850097280. Its totient is φ = 79157866982400.

The previous prime is 197981237015671. The next prime is 197981237015699. The reversal of 197981237015680 is 86510732189791.

It is a tau number, because it is divible by the number of its divisors (64).

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, 66167646 + ... + 69095005.

It is an arithmetic number, because the mean of its divisors is an integer number (7398528907770).

Almost surely, 2^{197981237015680} is an apocalyptic number.

197981237015680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197981237015680 is an abundant number, since it is smaller than the sum of its proper divisors (275524613081600).

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

197981237015680 is a wasteful number, since it uses less digits than its factorization.

197981237015680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135264957 (or 135264945 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 197981237015680 in words is "one hundred ninety-seven trillion, nine hundred eighty-one billion, two hundred thirty-seven million, fifteen thousand, six hundred eighty".