2644435956 has 12 divisors (see below), whose sum is σ = 6170350592. Its totient is φ = 881478648.

The previous prime is 2644435951. The next prime is 2644435987. The reversal of 2644435956 is 6595344462.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644435951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110184820 + ... + 110184843.

Almost surely, 2^2644435956 is an apocalyptic number.

It is an amenable number.

2644435956 is an abundant number, since it is smaller than the sum of its proper divisors (3525914636).

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

2644435956 is a wasteful number, since it uses less digits than its factorization.

2644435956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220369670 (or 220369668 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The square root of 2644435956 is about 51424.0795347860. The cubic root of 2644435956 is about 1382.8583121650.

The spelling of 2644435956 in words is "two billion, six hundred forty-four million, four hundred thirty-five thousand, nine hundred fifty-six".