2640643432 has 32 divisors (see below), whose sum is σ = 5904547200. Its totient is φ = 1082499264.

The previous prime is 2640643403. The next prime is 2640643451. The reversal of 2640643432 is 2343460462.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023807 + ... + 1026382.

It is an arithmetic number, because the mean of its divisors is an integer number (184517100).

Almost surely, 2^2640643432 is an apocalyptic number.

It is an amenable number.

2640643432 is an abundant number, since it is smaller than the sum of its proper divisors (3263903768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640643432 is a wasteful number, since it uses less digits than its factorization.

2640643432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050225 (or 2050221 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

The square root of 2640643432 is about 51387.1913223519. The cubic root of 2640643432 is about 1382.1969193926.

The spelling of 2640643432 in words is "two billion, six hundred forty million, six hundred forty-three thousand, four hundred thirty-two".