196684879257 has 48 divisors (see below), whose sum is σ = 295459871616. Its totient is φ = 125981856000.

The previous prime is 196684879253. The next prime is 196684879283. The reversal of 196684879257 is 752978486691.

196684879257 is a `hidden beast` number, since 1 + 9 + 6 + 6 + 8 + 487 + 92 + 57 = 666.

It is not a de Polignac number, because 196684879257 - 2² = 196684879253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196684879253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26535882 + ... + 26543292.

It is an arithmetic number, because the mean of its divisors is an integer number (6155413992).

Almost surely, 2^196684879257 is an apocalyptic number.

It is an amenable number.

196684879257 is a deficient number, since it is larger than the sum of its proper divisors (98774992359).

196684879257 is a wasteful number, since it uses less digits than its factorization.

196684879257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542 (or 8539 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 196684879257 in words is "one hundred ninety-six billion, six hundred eighty-four million, eight hundred seventy-nine thousand, two hundred fifty-seven".