8253557644 has 24 divisors (see below), whose sum is σ = 15306228000. Its totient is φ = 3887291520.

The previous prime is 8253557633. The next prime is 8253557651. The reversal of 8253557644 is 4467553528.

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, 862944 + ... + 872455.

It is an arithmetic number, because the mean of its divisors is an integer number (637759500).

Almost surely, 2^8253557644 is an apocalyptic number.

It is an amenable number.

8253557644 is a deficient number, since it is larger than the sum of its proper divisors (7052670356).

8253557644 is a wasteful number, since it uses less digits than its factorization.

8253557644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735473 (or 1735471 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 49.

The square root of 8253557644 is about 90849.0926977259. The cubic root of 8253557644 is about 2020.9104189408.

The spelling of 8253557644 in words is "eight billion, two hundred fifty-three million, five hundred fifty-seven thousand, six hundred forty-four".