2643133491 has 32 divisors (see below), whose sum is σ = 4125484800. Its totient is φ = 1667874240.

The previous prime is 2643133487. The next prime is 2643133513. The reversal of 2643133491 is 1943313462.

2643133491 is a `hidden beast` number, since 2 + 643 + 1 + 3 + 3 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 2643133491 - 2² = 2643133487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2643137491) 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, 1095076 + ... + 1097486.

It is an arithmetic number, because the mean of its divisors is an integer number (128921400).

Almost surely, 2^2643133491 is an apocalyptic number.

2643133491 is a deficient number, since it is larger than the sum of its proper divisors (1482351309).

2643133491 is a wasteful number, since it uses less digits than its factorization.

2643133491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576 (or 4570 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 2643133491 is about 51411.4140147886. The cubic root of 2643133491 is about 1382.6312416460.

The spelling of 2643133491 in words is "two billion, six hundred forty-three million, one hundred thirty-three thousand, four hundred ninety-one".