890992990657 has 16 divisors (see below), whose sum is σ = 1113704092800. Its totient is φ = 692495447040.

The previous prime is 890992990639. The next prime is 890992990739. The reversal of 890992990657 is 756099299098.

890992990657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 890992990657 - 2³⁹ = 341237176769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 890992990657.

It is not an unprimeable number, because it can be changed into a prime (890992990607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14843232 + ... + 14903137.

It is an arithmetic number, because the mean of its divisors is an integer number (69606505800).

Almost surely, 2^890992990657 is an apocalyptic number.

It is an amenable number.

890992990657 is a deficient number, since it is larger than the sum of its proper divisors (222711102143).

890992990657 is a wasteful number, since it uses less digits than its factorization.

890992990657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29746776.

The product of its (nonzero) digits is 198404640, while the sum is 73.

The spelling of 890992990657 in words is "eight hundred ninety billion, nine hundred ninety-two million, nine hundred ninety thousand, six hundred fifty-seven".