90371840855 has 4 divisors (see below), whose sum is σ = 108446209032. Its totient is φ = 72297472680.

The previous prime is 90371840849. The next prime is 90371840861. The reversal of 90371840855 is 55804817309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55804817309 = 109 ⋅511970801.

It is an interprime number because it is at equal distance from previous prime (90371840849) and next prime (90371840861).

It is not a de Polignac number, because 90371840855 - 2²⁰ = 90370792279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9037184081 + ... + 9037184090.

It is an arithmetic number, because the mean of its divisors is an integer number (27111552258).

Almost surely, 2^90371840855 is an apocalyptic number.

90371840855 is a deficient number, since it is larger than the sum of its proper divisors (18074368177).

90371840855 is a wasteful number, since it uses less digits than its factorization.

90371840855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18074368176.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 90371840855 in words is "ninety billion, three hundred seventy-one million, eight hundred forty thousand, eight hundred fifty-five".