89778985656 has 64 divisors (see below), whose sum is σ = 225373221120. Its totient is φ = 29803023360.

The previous prime is 89778985643. The next prime is 89778985663. The reversal of 89778985656 is 65658987798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16997736 + ... + 17003016.

It is an arithmetic number, because the mean of its divisors is an integer number (3521456580).

Almost surely, 2^89778985656 is an apocalyptic number.

It is an amenable number.

89778985656 is an abundant number, since it is smaller than the sum of its proper divisors (135594235464).

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

89778985656 is a wasteful number, since it uses less digits than its factorization.

89778985656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076 (or 8072 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 78.

The spelling of 89778985656 in words is "eighty-nine billion, seven hundred seventy-eight million, nine hundred eighty-five thousand, six hundred fifty-six".