90191727794 has 72 divisors (see below), whose sum is σ = 163336901760. Its totient is φ = 37240897680.

The previous prime is 90191727761. The next prime is 90191727803. The reversal of 90191727794 is 49772719109.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22506539 + ... + 22510545.

It is an arithmetic number, because the mean of its divisors is an integer number (2268568080).

Almost surely, 2^90191727794 is an apocalyptic number.

90191727794 is a deficient number, since it is larger than the sum of its proper divisors (73145173966).

90191727794 is a wasteful number, since it uses less digits than its factorization.

90191727794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 56.

The spelling of 90191727794 in words is "ninety billion, one hundred ninety-one million, seven hundred twenty-seven thousand, seven hundred ninety-four".