8368494640 has 80 divisors (see below), whose sum is σ = 21910311936. Its totient is φ = 2944915200.

The previous prime is 8368494623. The next prime is 8368494661. The reversal of 8368494640 is 464948638.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126102 + ... + 180661.

Almost surely, 2^8368494640 is an apocalyptic number.

8368494640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8368494640 is an abundant number, since it is smaller than the sum of its proper divisors (13541817296).

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

8368494640 is a wasteful number, since it uses less digits than its factorization.

8368494640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306818 (or 306812 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The square root of 8368494640 is about 91479.4766054113. The cubic root of 8368494640 is about 2030.2481064091.

The spelling of 8368494640 in words is "eight billion, three hundred sixty-eight million, four hundred ninety-four thousand, six hundred forty".