1641363613 has 2 divisors, whose sum is σ = 1641363614. Its totient is φ = 1641363612.

The previous prime is 1641363601. The next prime is 1641363631. The reversal of 1641363613 is 3163631461.

Together with next prime (1641363631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823575204 + 817788409 = 28698^2 + 28597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641363613 - 2¹³ = 1641355421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641363643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820681806 + 820681807.

It is an arithmetic number, because the mean of its divisors is an integer number (820681807).

Almost surely, 2^1641363613 is an apocalyptic number.

It is an amenable number.

1641363613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641363613 is an equidigital number, since it uses as much as digits as its factorization.

1641363613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 1641363613 is about 40513.7459759030. The cubic root of 1641363613 is about 1179.6004615460.

The spelling of 1641363613 in words is "one billion, six hundred forty-one million, three hundred sixty-three thousand, six hundred thirteen".