16890975953 has 2 divisors, whose sum is σ = 16890975954. Its totient is φ = 16890975952.

The previous prime is 16890975887. The next prime is 16890975989. The reversal of 16890975953 is 35957909861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16881285184 + 9690769 = 129928^2 + 3113^2 .

It is a cyclic number.

It is not a de Polignac number, because 16890975953 - 2¹⁶ = 16890910417 is a prime.

It is not a weakly prime, because it can be changed into another prime (16890975553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445487976 + 8445487977.

It is an arithmetic number, because the mean of its divisors is an integer number (8445487977).

Almost surely, 2^16890975953 is an apocalyptic number.

It is an amenable number.

16890975953 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890975953 is an equidigital number, since it uses as much as digits as its factorization.

16890975953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18370800, while the sum is 62.

The spelling of 16890975953 in words is "sixteen billion, eight hundred ninety million, nine hundred seventy-five thousand, nine hundred fifty-three".