641165610049 has 2 divisors, whose sum is σ = 641165610050. Its totient is φ = 641165610048.

The previous prime is 641165610017. The next prime is 641165610067. The reversal of 641165610049 is 940016561146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575370795024 + 65794815025 = 758532^2 + 256505^2 .

It is a cyclic number.

It is not a de Polignac number, because 641165610049 - 2⁵ = 641165610017 is a prime.

It is a super-2 number, since 2×641165610049² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641165609987 and 641165610014.

It is not a weakly prime, because it can be changed into another prime (641165610079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320582805024 + 320582805025.

It is an arithmetic number, because the mean of its divisors is an integer number (320582805025).

Almost surely, 2^641165610049 is an apocalyptic number.

It is an amenable number.

641165610049 is a deficient number, since it is larger than the sum of its proper divisors (1).

641165610049 is an equidigital number, since it uses as much as digits as its factorization.

641165610049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 641165610049 in words is "six hundred forty-one billion, one hundred sixty-five million, six hundred ten thousand, forty-nine".