90549905833 has 4 divisors (see below), whose sum is σ = 95876370900. Its totient is φ = 85223440768.

The previous prime is 90549905819. The next prime is 90549905851. The reversal of 90549905833 is 33850994509.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29428716304 + 61121189529 = 171548^2 + 247227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90549905833 is a prime.

It is a super-3 number, since 3×90549905833³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90549905813) 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, 2663232508 + ... + 2663232541.

It is an arithmetic number, because the mean of its divisors is an integer number (23969092725).

Almost surely, 2^90549905833 is an apocalyptic number.

It is an amenable number.

90549905833 is a deficient number, since it is larger than the sum of its proper divisors (5326465067).

90549905833 is a wasteful number, since it uses less digits than its factorization.

90549905833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326465066.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 90549905833 in words is "ninety billion, five hundred forty-nine million, nine hundred five thousand, eight hundred thirty-three".