890863816321 has 4 divisors (see below), whose sum is σ = 891112456192. Its totient is φ = 890615176452.

The previous prime is 890863816319. The next prime is 890863816343. The reversal of 890863816321 is 123618368098.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 890863816321 - 2¹ = 890863816319 is a prime.

It is a super-3 number, since 3×890863816321³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890863816721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124314561 + ... + 124321726.

It is an arithmetic number, because the mean of its divisors is an integer number (222778114048).

Almost surely, 2^890863816321 is an apocalyptic number.

It is an amenable number.

890863816321 is a deficient number, since it is larger than the sum of its proper divisors (248639871).

890863816321 is a wasteful number, since it uses less digits than its factorization.

890863816321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248639870.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The spelling of 890863816321 in words is "eight hundred ninety billion, eight hundred sixty-three million, eight hundred sixteen thousand, three hundred twenty-one".