90500548338491 has 4 divisors (see below), whose sum is σ = 90531030169800. Its totient is φ = 90470066507184.

The previous prime is 90500548338451. The next prime is 90500548338511. The reversal of 90500548338491 is 19483384500509.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90500548338491 is a prime.

It is a super-2 number, since 2×90500548338491² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90500548338491.

It is not an unprimeable number, because it can be changed into a prime (90500548338451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15240911201 + ... + 15240917138.

It is an arithmetic number, because the mean of its divisors is an integer number (22632757542450).

Almost surely, 2^{90500548338491} is an apocalyptic number.

90500548338491 is a deficient number, since it is larger than the sum of its proper divisors (30481831309).

90500548338491 is a wasteful number, since it uses less digits than its factorization.

90500548338491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30481831308.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 90500548338491 in words is "ninety trillion, five hundred billion, five hundred forty-eight million, three hundred thirty-eight thousand, four hundred ninety-one".