2644396902 has 32 divisors (see below), whose sum is σ = 6715929600. Its totient is φ = 755541864.

The previous prime is 2644396897. The next prime is 2644396913. The reversal of 2644396902 is 2096934462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3497502 + ... + 3498257.

It is an arithmetic number, because the mean of its divisors is an integer number (209872800).

Almost surely, 2^2644396902 is an apocalyptic number.

2644396902 is an abundant number, since it is smaller than the sum of its proper divisors (4071532698).

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

2644396902 is a wasteful number, since it uses less digits than its factorization.

2644396902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995777 (or 6995771 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 2644396902 is about 51423.6998085513. The cubic root of 2644396902 is about 1382.8515046119.

The spelling of 2644396902 in words is "two billion, six hundred forty-four million, three hundred ninety-six thousand, nine hundred two".