890996861345 has 4 divisors (see below), whose sum is σ = 1069196233620. Its totient is φ = 712797489072.

The previous prime is 890996861317. The next prime is 890996861383. The reversal of 890996861345 is 543168699098.

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

It can be written as a sum of positive squares in 2 ways, for example, as 667033191841 + 223963669504 = 816721^2 + 473248^2 .

It is a cyclic number.

It is not a de Polignac number, because 890996861345 - 2¹⁶ = 890996795809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89099686130 + ... + 89099686139.

It is an arithmetic number, because the mean of its divisors is an integer number (267299058405).

Almost surely, 2^890996861345 is an apocalyptic number.

It is an amenable number.

890996861345 is a deficient number, since it is larger than the sum of its proper divisors (178199372275).

890996861345 is a wasteful number, since it uses less digits than its factorization.

890996861345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178199372274.

The product of its (nonzero) digits is 100776960, while the sum is 68.

The spelling of 890996861345 in words is "eight hundred ninety billion, nine hundred ninety-six million, eight hundred sixty-one thousand, three hundred forty-five".