90478331155 has 16 divisors (see below), whose sum is σ = 113316102144. Its totient is φ = 69222456160.

The previous prime is 90478331147. The next prime is 90478331159. The reversal of 90478331155 is 55113387409.

It is a happy number.

It is not a de Polignac number, because 90478331155 - 2³ = 90478331147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90478331159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557262 + ... + 701068.

It is an arithmetic number, because the mean of its divisors is an integer number (7082256384).

Almost surely, 2^90478331155 is an apocalyptic number.

90478331155 is a deficient number, since it is larger than the sum of its proper divisors (22837770989).

90478331155 is a wasteful number, since it uses less digits than its factorization.

90478331155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149306.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 90478331155 in words is "ninety billion, four hundred seventy-eight million, three hundred thirty-one thousand, one hundred fifty-five".