2651381844 has 24 divisors (see below), whose sum is σ = 6202721280. Its totient is φ = 881484864.

The previous prime is 2651381839. The next prime is 2651381881. The reversal of 2651381844 is 4481831562.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2651381796 and 2651381805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283849 + ... + 293040.

It is an arithmetic number, because the mean of its divisors is an integer number (258446720).

Almost surely, 2^2651381844 is an apocalyptic number.

It is an amenable number.

2651381844 is an abundant number, since it is smaller than the sum of its proper divisors (3551339436).

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

2651381844 is a wasteful number, since it uses less digits than its factorization.

2651381844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577279 (or 577277 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 2651381844 is about 51491.5706111204. The cubic root of 2651381844 is about 1384.0679943930.

The spelling of 2651381844 in words is "two billion, six hundred fifty-one million, three hundred eighty-one thousand, eight hundred forty-four".