1992646641 has 16 divisors (see below), whose sum is σ = 2797669440. Its totient is φ = 1258076160.

The previous prime is 1992646571. The next prime is 1992646651. The reversal of 1992646641 is 1466462991.

It is not a de Polignac number, because 1992646641 - 2¹⁴ = 1992630257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1992646651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262621 + ... + 270101.

It is an arithmetic number, because the mean of its divisors is an integer number (174854340).

Almost surely, 2^1992646641 is an apocalyptic number.

It is an amenable number.

1992646641 is a deficient number, since it is larger than the sum of its proper divisors (805022799).

1992646641 is a wasteful number, since it uses less digits than its factorization.

1992646641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12176.

The product of its digits is 559872, while the sum is 48.

The square root of 1992646641 is about 44639.0707900601. The cubic root of 1992646641 is about 1258.3750449905.

The spelling of 1992646641 in words is "one billion, nine hundred ninety-two million, six hundred forty-six thousand, six hundred forty-one".