89640857418 has 32 divisors (see below), whose sum is σ = 205473856896. Its totient is φ = 25539115008.

The previous prime is 89640857413. The next prime is 89640857431. The reversal of 89640857418 is 81475804698.

It is not an unprimeable number, because it can be changed into a prime (89640857413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3008271 + ... + 3037922.

It is an arithmetic number, because the mean of its divisors is an integer number (6421058028).

Almost surely, 2^89640857418 is an apocalyptic number.

89640857418 is an abundant number, since it is smaller than the sum of its proper divisors (115832999478).

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

89640857418 is a wasteful number, since it uses less digits than its factorization.

89640857418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046558.

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 89640857418 in words is "eighty-nine billion, six hundred forty million, eight hundred fifty-seven thousand, four hundred eighteen".