90170421675712 has 28 divisors (see below), whose sum is σ = 204493634872720. Its totient is φ = 38644466432256.

The previous prime is 90170421675683. The next prime is 90170421675743. The reversal of 90170421675712 is 21757612407109.

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 90170421675712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100636630887 + ... + 100636631782.

Almost surely, 2^{90170421675712} is an apocalyptic number.

It is an amenable number.

90170421675712 is an abundant number, since it is smaller than the sum of its proper divisors (114323213197008).

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

90170421675712 is a wasteful number, since it uses less digits than its factorization.

90170421675712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201273262688 (or 201273262678 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 90170421675712 in words is "ninety trillion, one hundred seventy billion, four hundred twenty-one million, six hundred seventy-five thousand, seven hundred twelve".