90928191018180 has 96 divisors (see below), whose sum is σ = 259865763131520. Its totient is φ = 23751007329280.

The previous prime is 90928191018139. The next prime is 90928191018209. The reversal of 90928191018180 is 8181019182909.

It is a self number, because there is not a number n which added to its sum of digits gives 90928191018180.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78997551 + ... + 80140310.

It is an arithmetic number, because the mean of its divisors is an integer number (2706935032620).

Almost surely, 2^{90928191018180} is an apocalyptic number.

It is an amenable number.

90928191018180 is an abundant number, since it is smaller than the sum of its proper divisors (168937572113340).

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

90928191018180 is a wasteful number, since it uses less digits than its factorization.

90928191018180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159138069 (or 159138067 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 57.

The spelling of 90928191018180 in words is "ninety trillion, nine hundred twenty-eight billion, one hundred ninety-one million, eighteen thousand, one hundred eighty".