90915005505 has 24 divisors (see below), whose sum is σ = 145614897792. Its totient is φ = 48437753056.

The previous prime is 90915005497. The next prime is 90915005509. The reversal of 90915005505 is 50550051909.

It is a happy number.

It is not a de Polignac number, because 90915005505 - 2³ = 90915005497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90915005509) 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 23 ways as a sum of consecutive naturals, for example, 31059352 + ... + 31062278.

It is an arithmetic number, because the mean of its divisors is an integer number (6067287408).

Almost surely, 2^90915005505 is an apocalyptic number.

It is an amenable number.

90915005505 is a deficient number, since it is larger than the sum of its proper divisors (54699892287).

90915005505 is an equidigital number, since it uses as much as digits as its factorization.

90915005505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5813 (or 4374 counting only the distinct ones).

The product of its (nonzero) digits is 50625, while the sum is 39.

The spelling of 90915005505 in words is "ninety billion, nine hundred fifteen million, five thousand, five hundred five".