89889633855 has 96 divisors (see below), whose sum is σ = 181208401920. Its totient is φ = 40369155840.

The previous prime is 89889633833. The next prime is 89889633877. The reversal of 89889633855 is 55833698898.

89889633855 is a `hidden beast` number, since 89 + 88 + 96 + 3 + 385 + 5 = 666.

It is a Cunningham number, because it is equal to 299816²-1.

It is an interprime number because it is at equal distance from previous prime (89889633833) and next prime (89889633877).

It is not a de Polignac number, because 89889633855 - 2⁸ = 89889633599 is a prime.

It is a super-2 number, since 2×89889633855² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18885966 + ... + 18890724.

It is an arithmetic number, because the mean of its divisors is an integer number (1887587520).

Almost surely, 2^89889633855 is an apocalyptic number.

89889633855 is an abundant number, since it is smaller than the sum of its proper divisors (91318768065).

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

89889633855 is a wasteful number, since it uses less digits than its factorization.

89889633855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821 (or 5818 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 72.

The spelling of 89889633855 in words is "eighty-nine billion, eight hundred eighty-nine million, six hundred thirty-three thousand, eight hundred fifty-five".