642163599 has 64 divisors (see below), whose sum is σ = 1190400000. Its totient is φ = 332385120.

The previous prime is 642163567. The next prime is 642163609. The reversal of 642163599 is 995361246.

642163599 is a `hidden beast` number, since 6 + 4 + 2 + 1 + 635 + 9 + 9 = 666.

642163599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642163599 - 2⁵ = 642163567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642163549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1037112 + ... + 1037730.

It is an arithmetic number, because the mean of its divisors is an integer number (18600000).

Almost surely, 2^642163599 is an apocalyptic number.

642163599 is a deficient number, since it is larger than the sum of its proper divisors (548236401).

642163599 is a wasteful number, since it uses less digits than its factorization.

642163599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 642163599 is about 25340.9470817489. The cubic root of 642163599 is about 862.7438947309.

The spelling of 642163599 in words is "six hundred forty-two million, one hundred sixty-three thousand, five hundred ninety-nine".