8745199920 has 120 divisors (see below), whose sum is σ = 30915097200. Its totient is φ = 2209310208.

The previous prime is 8745199847. The next prime is 8745199921. The reversal of 8745199920 is 299915478.

8745199920 is a `hidden beast` number, since 87 + 451 + 9 + 99 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (8745199921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305955 + ... + 333314.

It is an arithmetic number, because the mean of its divisors is an integer number (257625810).

Almost surely, 2^8745199920 is an apocalyptic number.

8745199920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8745199920 is an abundant number, since it is smaller than the sum of its proper divisors (22169897280).

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

8745199920 is a wasteful number, since it uses less digits than its factorization.

8745199920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639307 (or 639298 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 8745199920 is about 93515.7736427390. The cubic root of 8745199920 is about 2060.2657714723.

The spelling of 8745199920 in words is "eight billion, seven hundred forty-five million, one hundred ninety-nine thousand, nine hundred twenty".