90520285857 has 8 divisors (see below), whose sum is σ = 120750896640. Its totient is φ = 60318266160.

The previous prime is 90520285829. The next prime is 90520285879. The reversal of 90520285857 is 75858202509.

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

It is not a de Polignac number, because 90520285857 - 2¹⁴ = 90520269473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90520285897) 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 7 ways as a sum of consecutive naturals, for example, 7140382 + ... + 7153047.

It is an arithmetic number, because the mean of its divisors is an integer number (15093862080).

Almost surely, 2^90520285857 is an apocalyptic number.

It is an amenable number.

90520285857 is a deficient number, since it is larger than the sum of its proper divisors (30230610783).

90520285857 is a wasteful number, since it uses less digits than its factorization.

90520285857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14295543.

The product of its (nonzero) digits is 2016000, while the sum is 51.

The spelling of 90520285857 in words is "ninety billion, five hundred twenty million, two hundred eighty-five thousand, eight hundred fifty-seven".