2251666631453 has 2 divisors, whose sum is σ = 2251666631454. Its totient is φ = 2251666631452.

The previous prime is 2251666631447. The next prime is 2251666631503. The reversal of 2251666631453 is 3541366661522.

It is an a-pointer prime, because the next prime (2251666631503) can be obtained adding 2251666631453 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377437891449 + 874228740004 = 1173643^2 + 935002^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251666631453 - 2²⁸ = 2251398195997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251666631413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125833315726 + 1125833315727.

It is an arithmetic number, because the mean of its divisors is an integer number (1125833315727).

Almost surely, 2^{2251666631453} is an apocalyptic number.

It is an amenable number.

2251666631453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251666631453 is an equidigital number, since it uses as much as digits as its factorization.

2251666631453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The spelling of 2251666631453 in words is "two trillion, two hundred fifty-one billion, six hundred sixty-six million, six hundred thirty-one thousand, four hundred fifty-three".