90917227781850 has 48 divisors (see below), whose sum is σ = 225660607234272. Its totient is φ = 24224606727360.

The previous prime is 90917227781843. The next prime is 90917227781869. The reversal of 90917227781850 is 5818772271909.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249659292 + ... + 250023191.

It is an arithmetic number, because the mean of its divisors is an integer number (4701262650714).

Almost surely, 2^{90917227781850} is an apocalyptic number.

90917227781850 is an abundant number, since it is smaller than the sum of its proper divisors (134743379452422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90917227781850 is a wasteful number, since it uses less digits than its factorization.

90917227781850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499683711 (or 499683706 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 66.

The spelling of 90917227781850 in words is "ninety trillion, nine hundred seventeen billion, two hundred twenty-seven million, seven hundred eighty-one thousand, eight hundred fifty".