201681652979 has 12 divisors (see below), whose sum is σ = 212943423744. Its totient is φ = 190987593552.

The previous prime is 201681652973. The next prime is 201681652981. The reversal of 201681652979 is 979256186102.

It is a de Polignac number, because none of the positive numbers 2^k-201681652979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201681652973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765134 + ... + 994380.

It is an arithmetic number, because the mean of its divisors is an integer number (17745285312).

Almost surely, 2^201681652979 is an apocalyptic number.

201681652979 is a deficient number, since it is larger than the sum of its proper divisors (11261770765).

201681652979 is a wasteful number, since it uses less digits than its factorization.

201681652979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231722 (or 231703 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 201681652979 in words is "two hundred one billion, six hundred eighty-one million, six hundred fifty-two thousand, nine hundred seventy-nine".