89439936818 has 16 divisors (see below), whose sum is σ = 142059204864. Its totient is φ = 42087147840.

The previous prime is 89439936799. The next prime is 89439936851. The reversal of 89439936818 is 81863993498.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704603 + ... + 821793.

It is an arithmetic number, because the mean of its divisors is an integer number (8878700304).

Almost surely, 2^89439936818 is an apocalyptic number.

89439936818 is a deficient number, since it is larger than the sum of its proper divisors (52619268046).

89439936818 is a wasteful number, since it uses less digits than its factorization.

89439936818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139657.

The product of its digits is 80621568, while the sum is 68.

The spelling of 89439936818 in words is "eighty-nine billion, four hundred thirty-nine million, nine hundred thirty-six thousand, eight hundred eighteen".