2100646996453 has 2 divisors, whose sum is σ = 2100646996454. Its totient is φ = 2100646996452.

The previous prime is 2100646996451. The next prime is 2100646996457. The reversal of 2100646996453 is 3546996460012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2099435817249 + 1211179204 = 1448943^2 + 34802^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100646996453 - 2¹ = 2100646996451 is a prime.

Together with 2100646996451, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2100646996394 and 2100646996403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100646996451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050323498226 + 1050323498227.

It is an arithmetic number, because the mean of its divisors is an integer number (1050323498227).

Almost surely, 2^{2100646996453} is an apocalyptic number.

It is an amenable number.

2100646996453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100646996453 is an equidigital number, since it uses as much as digits as its factorization.

2100646996453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 2100646996453 in words is "two trillion, one hundred billion, six hundred forty-six million, nine hundred ninety-six thousand, four hundred fifty-three".