1630621660201 has 2 divisors, whose sum is σ = 1630621660202. Its totient is φ = 1630621660200.

The previous prime is 1630621660193. The next prime is 1630621660253. The reversal of 1630621660201 is 1020661260361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1072672418601 + 557949241600 = 1035699^2 + 746960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630621660201 - 2³ = 1630621660193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630621630201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815310830100 + 815310830101.

It is an arithmetic number, because the mean of its divisors is an integer number (815310830101).

Almost surely, 2^{1630621660201} is an apocalyptic number.

It is an amenable number.

1630621660201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630621660201 is an equidigital number, since it uses as much as digits as its factorization.

1630621660201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 1630621660201 in words is "one trillion, six hundred thirty billion, six hundred twenty-one million, six hundred sixty thousand, two hundred one".