8199800640 has 112 divisors (see below), whose sum is σ = 28927104960. Its totient is φ = 2186611200.

The previous prime is 8199800639. The next prime is 8199800659. The reversal of 8199800640 is 460089918.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 465886 + ... + 483165.

Almost surely, 2^8199800640 is an apocalyptic number.

8199800640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8199800640 is an abundant number, since it is smaller than the sum of its proper divisors (20727304320).

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

8199800640 is a wasteful number, since it uses less digits than its factorization.

8199800640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949077 (or 949061 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 8199800640 is about 90552.7505932316. The cubic root of 8199800640 is about 2016.5133329980.

The spelling of 8199800640 in words is "eight billion, one hundred ninety-nine million, eight hundred thousand, six hundred forty".