90155336889 has 16 divisors (see below), whose sum is σ = 126916110080. Its totient is φ = 56768176080.

The previous prime is 90155336849. The next prime is 90155336891. The reversal of 90155336889 is 98863355109.

It is a de Polignac number, because none of the positive numbers 2^k-90155336889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90155336809) 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, 2370367 + ... + 2408100.

It is an arithmetic number, because the mean of its divisors is an integer number (7932256880).

Almost surely, 2^90155336889 is an apocalyptic number.

It is an amenable number.

90155336889 is a deficient number, since it is larger than the sum of its proper divisors (36760773191).

90155336889 is a wasteful number, since it uses less digits than its factorization.

90155336889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778820.

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 90155336889 in words is "ninety billion, one hundred fifty-five million, three hundred thirty-six thousand, eight hundred eighty-nine".