197931376845 has 42 divisors (see below), whose sum is σ = 356161904298. Its totient is φ = 105549075648.

The previous prime is 197931376829. The next prime is 197931376913. The reversal of 197931376845 is 548673139791.

197931376845 is a `hidden beast` number, since 197 + 9 + 31 + 376 + 8 + 45 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 107121362436 + 90810014409 = 327294^2 + 301347^2 .

It is not a de Polignac number, because 197931376845 - 2⁴ = 197931376829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 26856321 + ... + 26863689.

Almost surely, 2^197931376845 is an apocalyptic number.

197931376845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197931376845 is a deficient number, since it is larger than the sum of its proper divisors (158230527453).

197931376845 is an frugal number, since it uses more digits than its factorization.

197931376845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14761 (or 7377 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 197931376845 in words is "one hundred ninety-seven billion, nine hundred thirty-one million, three hundred seventy-six thousand, eight hundred forty-five".