90217564133 has 4 divisors (see below), whose sum is σ = 90231317088. Its totient is φ = 90203811180.

The previous prime is 90217564111. The next prime is 90217564153. The reversal of 90217564133 is 33146571209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90217564133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90217564153) 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 3 ways as a sum of consecutive naturals, for example, 6866633 + ... + 6879758.

It is an arithmetic number, because the mean of its divisors is an integer number (22557829272).

Almost surely, 2^90217564133 is an apocalyptic number.

It is an amenable number.

90217564133 is a deficient number, since it is larger than the sum of its proper divisors (13752955).

90217564133 is a wasteful number, since it uses less digits than its factorization.

90217564133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13752954.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 90217564133 in words is "ninety billion, two hundred seventeen million, five hundred sixty-four thousand, one hundred thirty-three".