196249008921 has 32 divisors (see below), whose sum is σ = 308732510208. Its totient is φ = 108510822720.

The previous prime is 196249008871. The next prime is 196249008941. The reversal of 196249008921 is 129800942691.

It is not a de Polignac number, because 196249008921 - 2²⁷ = 196114791193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196249008941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6973140 + ... + 7001226.

It is an arithmetic number, because the mean of its divisors is an integer number (9647890944).

Almost surely, 2^196249008921 is an apocalyptic number.

It is an amenable number.

196249008921 is a deficient number, since it is larger than the sum of its proper divisors (112483501287).

196249008921 is a wasteful number, since it uses less digits than its factorization.

196249008921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38861.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 196249008921 in words is "one hundred ninety-six billion, two hundred forty-nine million, eight thousand, nine hundred twenty-one".