8251663758 has 64 divisors (see below), whose sum is σ = 18180771840. Its totient is φ = 2480873472.

The previous prime is 8251663727. The next prime is 8251663769. The reversal of 8251663758 is 8573661528.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8251663758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2817691 + ... + 2820617.

It is an arithmetic number, because the mean of its divisors is an integer number (284074560).

Almost surely, 2^8251663758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8251663758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9090385920).

8251663758 is an abundant number, since it is smaller than the sum of its proper divisors (9929108082).

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

8251663758 is a wasteful number, since it uses less digits than its factorization.

8251663758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761.

The product of its digits is 2419200, while the sum is 51.

The square root of 8251663758 is about 90838.6688475783. The cubic root of 8251663758 is about 2020.7558324017.

The spelling of 8251663758 in words is "eight billion, two hundred fifty-one million, six hundred sixty-three thousand, seven hundred fifty-eight".