2621644004 has 12 divisors (see below), whose sum is σ = 5243288064. Its totient is φ = 1123561704.

The previous prime is 2621643979. The next prime is 2621644013. The reversal of 2621644004 is 4004461262.

It is a happy number.

2621644004 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46815044 + ... + 46815099.

It is an arithmetic number, because the mean of its divisors is an integer number (436940672).

Almost surely, 2^2621644004 is an apocalyptic number.

It is an amenable number.

2621644004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2621644004 is a wasteful number, since it uses less digits than its factorization.

2621644004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93630154 (or 93630152 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2621644004 is about 51201.9921878046. The cubic root of 2621644004 is about 1378.8739683761.

The spelling of 2621644004 in words is "two billion, six hundred twenty-one million, six hundred forty-four thousand, four".