90257685019 has 4 divisors (see below), whose sum is σ = 92178061344. Its totient is φ = 88337308696.

The previous prime is 90257684999. The next prime is 90257685053. The reversal of 90257685019 is 91058675209.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90257685019 - 2²¹ = 90255587867 is a prime.

It is a super-2 number, since 2×90257685019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90257685619) by changing a digit.

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, 960188092 + ... + 960188185.

It is an arithmetic number, because the mean of its divisors is an integer number (23044515336).

Almost surely, 2^90257685019 is an apocalyptic number.

90257685019 is a deficient number, since it is larger than the sum of its proper divisors (1920376325).

90257685019 is a wasteful number, since it uses less digits than its factorization.

90257685019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920376324.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 90257685019 in words is "ninety billion, two hundred fifty-seven million, six hundred eighty-five thousand, nineteen".