90193895257 has 8 divisors (see below), whose sum is σ = 90481345920. Its totient is φ = 89906874720.

The previous prime is 90193895249. The next prime is 90193895269. The reversal of 90193895257 is 75259839109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90193895257 - 2³ = 90193895249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90193895357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315157 + ... + 528877.

It is an arithmetic number, because the mean of its divisors is an integer number (11310168240).

Almost surely, 2^90193895257 is an apocalyptic number.

It is an amenable number.

90193895257 is a deficient number, since it is larger than the sum of its proper divisors (287450663).

90193895257 is a wasteful number, since it uses less digits than its factorization.

90193895257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215063.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 90193895257 in words is "ninety billion, one hundred ninety-three million, eight hundred ninety-five thousand, two hundred fifty-seven".