2501644820 has 24 divisors (see below), whose sum is σ = 5422921728. Its totient is φ = 968378400.

The previous prime is 2501644793. The next prime is 2501644853. The reversal of 2501644820 is 284461052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2016836 + ... + 2018075.

It is an arithmetic number, because the mean of its divisors is an integer number (225955072).

Almost surely, 2^2501644820 is an apocalyptic number.

2501644820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2501644820 is an abundant number, since it is smaller than the sum of its proper divisors (2921276908).

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

2501644820 is a wasteful number, since it uses less digits than its factorization.

2501644820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034951 (or 4034949 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 2501644820 is about 50016.4454954568. The cubic root of 2501644820 is about 1357.5063916031.

The spelling of 2501644820 in words is "two billion, five hundred one million, six hundred forty-four thousand, eight hundred twenty".