639616057511 has 2 divisors, whose sum is σ = 639616057512. Its totient is φ = 639616057510.

The previous prime is 639616057463. The next prime is 639616057543. The reversal of 639616057511 is 115750616936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 639616057511 - 2²² = 639611863207 is a prime.

It is a super-3 number, since 3×639616057511³ (a number of 36 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 639616057511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (639616057571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319808028755 + 319808028756.

It is an arithmetic number, because the mean of its divisors is an integer number (319808028756).

Almost surely, 2^639616057511 is an apocalyptic number.

639616057511 is a deficient number, since it is larger than the sum of its proper divisors (1).

639616057511 is an equidigital number, since it uses as much as digits as its factorization.

639616057511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 639616057511 in words is "six hundred thirty-nine billion, six hundred sixteen million, fifty-seven thousand, five hundred eleven".