197890983646 has 16 divisors (see below), whose sum is σ = 301775997600. Its totient is φ = 97299773280.

The previous prime is 197890983629. The next prime is 197890983701. The reversal of 197890983646 is 646389098791.

It is a congruent number.

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, 312055 + ... + 702253.

It is an arithmetic number, because the mean of its divisors is an integer number (18860999850).

Almost surely, 2^197890983646 is an apocalyptic number.

197890983646 is a deficient number, since it is larger than the sum of its proper divisors (103885013954).

197890983646 is a wasteful number, since it uses less digits than its factorization.

197890983646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394419.

The product of its (nonzero) digits is 141087744, while the sum is 70.

The spelling of 197890983646 in words is "one hundred ninety-seven billion, eight hundred ninety million, nine hundred eighty-three thousand, six hundred forty-six".