197908009872 has 40 divisors (see below), whose sum is σ = 514648221120. Its totient is φ = 65532451200.

The previous prime is 197908009861. The next prime is 197908009907. The reversal of 197908009872 is 278900809791.

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, 13645347 + ... + 13659842.

It is an arithmetic number, because the mean of its divisors is an integer number (12866205528).

Almost surely, 2^197908009872 is an apocalyptic number.

197908009872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

197908009872 is an abundant number, since it is smaller than the sum of its proper divisors (316740211248).

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

197908009872 is a wasteful number, since it uses less digits than its factorization.

197908009872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27305351 (or 27305345 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 60.

The spelling of 197908009872 in words is "one hundred ninety-seven billion, nine hundred eight million, nine thousand, eight hundred seventy-two".