2625805644 has 48 divisors (see below), whose sum is σ = 7638710016. Its totient is φ = 682027200.

The previous prime is 2625805607. The next prime is 2625805673. The reversal of 2625805644 is 4465085262.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2625805596 and 2625805605.

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, 1419967 + ... + 1421814.

It is an arithmetic number, because the mean of its divisors is an integer number (159139792).

Almost surely, 2^2625805644 is an apocalyptic number.

It is an amenable number.

2625805644 is an abundant number, since it is smaller than the sum of its proper divisors (5012904372).

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

2625805644 is a wasteful number, since it uses less digits than its factorization.

2625805644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841806 (or 2841804 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The square root of 2625805644 is about 51242.6155070172. The cubic root of 2625805644 is about 1379.6031982449.

The spelling of 2625805644 in words is "two billion, six hundred twenty-five million, eight hundred five thousand, six hundred forty-four".