90556839140 has 12 divisors (see below), whose sum is σ = 190169362236. Its totient is φ = 36222735648.

The previous prime is 90556839103. The next prime is 90556839187. The reversal of 90556839140 is 4193865509.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30953476096 + 59603363044 = 175936^2 + 244138^2 .

It is a super-2 number, since 2×90556839140² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263920959 + ... + 2263920998.

It is an arithmetic number, because the mean of its divisors is an integer number (15847446853).

Almost surely, 2^90556839140 is an apocalyptic number.

It is an amenable number.

90556839140 is an abundant number, since it is smaller than the sum of its proper divisors (99612523096).

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

90556839140 is a wasteful number, since it uses less digits than its factorization.

90556839140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527841966 (or 4527841964 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 90556839140 in words is "ninety billion, five hundred fifty-six million, eight hundred thirty-nine thousand, one hundred forty".