1641362641 has 2 divisors, whose sum is σ = 1641362642. Its totient is φ = 1641362640.

The previous prime is 1641362627. The next prime is 1641362647. The reversal of 1641362641 is 1462631461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238758416 + 402604225 = 35196^2 + 20065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641362641 - 2⁵ = 1641362609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1641362597 and 1641362606.

It is not a weakly prime, because it can be changed into another prime (1641362647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820681320 + 820681321.

It is an arithmetic number, because the mean of its divisors is an integer number (820681321).

Almost surely, 2^1641362641 is an apocalyptic number.

It is an amenable number.

1641362641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641362641 is an equidigital number, since it uses as much as digits as its factorization.

1641362641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 1641362641 is about 40513.7339799728. The cubic root of 1641362641 is about 1179.6002286966.

The spelling of 1641362641 in words is "one billion, six hundred forty-one million, three hundred sixty-two thousand, six hundred forty-one".