90578397166118 has 4 divisors (see below), whose sum is σ = 135867595749180. Its totient is φ = 45289198583058.

The previous prime is 90578397166069. The next prime is 90578397166129. The reversal of 90578397166118 is 81166179387509.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22644599291528 + ... + 22644599291531.

It is an arithmetic number, because the mean of its divisors is an integer number (33966898937295).

Almost surely, 2^{90578397166118} is an apocalyptic number.

90578397166118 is a deficient number, since it is larger than the sum of its proper divisors (45289198583062).

90578397166118 is a wasteful number, since it uses less digits than its factorization.

90578397166118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45289198583061.

The product of its (nonzero) digits is 137168640, while the sum is 71.

The spelling of 90578397166118 in words is "ninety trillion, five hundred seventy-eight billion, three hundred ninety-seven million, one hundred sixty-six thousand, one hundred eighteen".