1641015263 has 2 divisors, whose sum is σ = 1641015264. Its totient is φ = 1641015262.

The previous prime is 1641015239. The next prime is 1641015269. The reversal of 1641015263 is 3625101461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641015263 - 2¹⁸ = 1640753119 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641015269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820507631 + 820507632.

It is an arithmetic number, because the mean of its divisors is an integer number (820507632).

Almost surely, 2^1641015263 is an apocalyptic number.

1641015263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641015263 is an equidigital number, since it uses as much as digits as its factorization.

1641015263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1641015263 is about 40509.4465896536. The cubic root of 1641015263 is about 1179.5170059585.

The spelling of 1641015263 in words is "one billion, six hundred forty-one million, fifteen thousand, two hundred sixty-three".