890605635642 has 12 divisors (see below), whose sum is σ = 1929645543930. Its totient is φ = 296868545208.

The previous prime is 890605635613. The next prime is 890605635653. The reversal of 890605635642 is 246536506098.

It can be written as a sum of positive squares in only one way, i.e., 890605550961 + 84681 = 943719^2 + 291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24739045417 + ... + 24739045452.

Almost surely, 2^890605635642 is an apocalyptic number.

890605635642 is an abundant number, since it is smaller than the sum of its proper divisors (1039039908288).

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

890605635642 is a wasteful number, since it uses less digits than its factorization.

890605635642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49478090877 (or 49478090874 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 890605635642 in words is "eight hundred ninety billion, six hundred five million, six hundred thirty-five thousand, six hundred forty-two".