90289512890 has 32 divisors (see below), whose sum is σ = 165046089024. Its totient is φ = 35555351040.

The previous prime is 90289512883. The next prime is 90289512941. The reversal of 90289512890 is 9821598209.

It is a super-2 number, since 2×90289512890² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097285 + ... + 1176695.

It is an arithmetic number, because the mean of its divisors is an integer number (5157690282).

Almost surely, 2^90289512890 is an apocalyptic number.

90289512890 is a deficient number, since it is larger than the sum of its proper divisors (74756576134).

90289512890 is a wasteful number, since it uses less digits than its factorization.

90289512890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81182.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 90289512890 in words is "ninety billion, two hundred eighty-nine million, five hundred twelve thousand, eight hundred ninety".