8631243564 has 12 divisors (see below), whose sum is σ = 20139568344. Its totient is φ = 2877081184.

The previous prime is 8631243547. The next prime is 8631243571. The reversal of 8631243564 is 4653421368.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8631243564² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359635137 + ... + 359635160.

It is an arithmetic number, because the mean of its divisors is an integer number (1678297362).

Almost surely, 2^8631243564 is an apocalyptic number.

It is an amenable number.

8631243564 is an abundant number, since it is smaller than the sum of its proper divisors (11508324780).

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

8631243564 is a wasteful number, since it uses less digits than its factorization.

8631243564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719270304 (or 719270302 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 8631243564 is about 92904.4862425922. The cubic root of 8631243564 is about 2051.2776935977.

The spelling of 8631243564 in words is "eight billion, six hundred thirty-one million, two hundred forty-three thousand, five hundred sixty-four".