8226537640 has 32 divisors (see below), whose sum is σ = 18644829480. Its totient is φ = 3266593792.

The previous prime is 8226537601. The next prime is 8226537659. The reversal of 8226537640 is 467356228.

It can be written as a sum of positive squares in 4 ways, for example, as 6552254916 + 1674282724 = 80946^2 + 40918^2 .

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, 745117 + ... + 756076.

Almost surely, 2^8226537640 is an apocalyptic number.

It is an amenable number.

8226537640 is an abundant number, since it is smaller than the sum of its proper divisors (10418291840).

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

8226537640 is a wasteful number, since it uses less digits than its factorization.

8226537640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501341 (or 1501337 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 8226537640 is about 90700.2626236551. The cubic root of 8226537640 is about 2018.7026960771.

The spelling of 8226537640 in words is "eight billion, two hundred twenty-six million, five hundred thirty-seven thousand, six hundred forty".