90109824866 has 8 divisors (see below), whose sum is σ = 135512205660. Its totient is φ = 44939089648.

The previous prime is 90109824863. The next prime is 90109824877. The reversal of 90109824866 is 66842890109.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84664122841 + 5445702025 = 290971^2 + 73795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90109824863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57910421 + ... + 57911976.

Almost surely, 2^90109824866 is an apocalyptic number.

90109824866 is a deficient number, since it is larger than the sum of its proper divisors (45402380794).

90109824866 is a wasteful number, since it uses less digits than its factorization.

90109824866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115822788.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 90109824866 in words is "ninety billion, one hundred nine million, eight hundred twenty-four thousand, eight hundred sixty-six".