89778985655 has 8 divisors (see below), whose sum is σ = 108197165232. Its totient is φ = 71514933568.

The previous prime is 89778985643. The next prime is 89778985663. The reversal of 89778985655 is 55658987798.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89778985655 - 2²⁰ = 89777937079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38530589 + ... + 38532918.

It is an arithmetic number, because the mean of its divisors is an integer number (13524645654).

Almost surely, 2^89778985655 is an apocalyptic number.

89778985655 is a deficient number, since it is larger than the sum of its proper divisors (18418179577).

89778985655 is a wasteful number, since it uses less digits than its factorization.

89778985655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77063745.

The product of its digits is 1524096000, while the sum is 77.

The spelling of 89778985655 in words is "eighty-nine billion, seven hundred seventy-eight million, nine hundred eighty-five thousand, six hundred fifty-five".