2551121650 has 144 divisors (see below), whose sum is σ = 6067736640. Its totient is φ = 780912000.

The previous prime is 2551121593. The next prime is 2551121689. The reversal of 2551121650 is 561211552.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2498140 + ... + 2499160.

It is an arithmetic number, because the mean of its divisors is an integer number (42137060).

Almost surely, 2^2551121650 is an apocalyptic number.

2551121650 is an abundant number, since it is smaller than the sum of its proper divisors (3516614990).

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

2551121650 is a wasteful number, since it uses less digits than its factorization.

2551121650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 2551121650 is about 50508.6294607169. The cubic root of 2551121650 is about 1366.3974917691.

The spelling of 2551121650 in words is "two billion, five hundred fifty-one million, one hundred twenty-one thousand, six hundred fifty".