1630621660253 has 2 divisors, whose sum is σ = 1630621660254. Its totient is φ = 1630621660252.

The previous prime is 1630621660201. The next prime is 1630621660303. The reversal of 1630621660253 is 3520661260361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1328295435289 + 302326224964 = 1152517^2 + 549842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630621660253 - 2¹⁶ = 1630621594717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630621660253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630621620253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815310830126 + 815310830127.

It is an arithmetic number, because the mean of its divisors is an integer number (815310830127).

Almost surely, 2^{1630621660253} is an apocalyptic number.

It is an amenable number.

1630621660253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630621660253 is an equidigital number, since it uses as much as digits as its factorization.

1630621660253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 1630621660253 in words is "one trillion, six hundred thirty billion, six hundred twenty-one million, six hundred sixty thousand, two hundred fifty-three".