8640558942 has 16 divisors (see below), whose sum is σ = 17607177360. Its totient is φ = 2825843072.

The previous prime is 8640558931. The next prime is 8640558943. The reversal of 8640558942 is 2498550468.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640558943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13585467 + ... + 13586102.

It is an arithmetic number, because the mean of its divisors is an integer number (1100448585).

Almost surely, 2^8640558942 is an apocalyptic number.

8640558942 is an abundant number, since it is smaller than the sum of its proper divisors (8966618418).

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

8640558942 is a wasteful number, since it uses less digits than its factorization.

8640558942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27171627.

The product of its (nonzero) digits is 2764800, while the sum is 51.

The square root of 8640558942 is about 92954.6068895996. The cubic root of 8640558942 is about 2052.0153840105.

The spelling of 8640558942 in words is "eight billion, six hundred forty million, five hundred fifty-eight thousand, nine hundred forty-two".