90500532991819 has 16 divisors (see below), whose sum is σ = 95308124155200. Its totient is φ = 85765780717056.

The previous prime is 90500532991733. The next prime is 90500532991823. The reversal of 90500532991819 is 91819923500509.

It is a cyclic number.

It is not a de Polignac number, because 90500532991819 - 2²¹ = 90500530894667 is a prime.

It is a super-2 number, since 2×90500532991819² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90500532991849) 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, 36321487 + ... + 38733079.

It is an arithmetic number, because the mean of its divisors is an integer number (5956757759700).

Almost surely, 2^{90500532991819} is an apocalyptic number.

90500532991819 is a deficient number, since it is larger than the sum of its proper divisors (4807591163381).

90500532991819 is a wasteful number, since it uses less digits than its factorization.

90500532991819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426694.

The product of its (nonzero) digits is 7873200, while the sum is 61.

The spelling of 90500532991819 in words is "ninety trillion, five hundred billion, five hundred thirty-two million, nine hundred ninety-one thousand, eight hundred nineteen".