90121515351553 has 16 divisors (see below), whose sum is σ = 103420949005440. Its totient is φ = 76928786372736.

The previous prime is 90121515351529. The next prime is 90121515351563. The reversal of 90121515351553 is 35515351512109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90121515351553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90121515351563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17365843 + ... + 21950296.

It is an arithmetic number, because the mean of its divisors is an integer number (6463809312840).

Almost surely, 2^{90121515351553} is an apocalyptic number.

It is an amenable number.

90121515351553 is a deficient number, since it is larger than the sum of its proper divisors (13299433653887).

90121515351553 is a wasteful number, since it uses less digits than its factorization.

90121515351553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39317496.

The product of its (nonzero) digits is 506250, while the sum is 46.

The spelling of 90121515351553 in words is "ninety trillion, one hundred twenty-one billion, five hundred fifteen million, three hundred fifty-one thousand, five hundred fifty-three".