135639074639 has 2 divisors, whose sum is σ = 135639074640. Its totient is φ = 135639074638.

The previous prime is 135639074629. The next prime is 135639074647. The reversal of 135639074639 is 936470936531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135639074639 - 2¹² = 135639070543 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 (135639074629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67819537319 + 67819537320.

It is an arithmetic number, because the mean of its divisors is an integer number (67819537320).

Almost surely, 2^135639074639 is an apocalyptic number.

135639074639 is a deficient number, since it is larger than the sum of its proper divisors (1).

135639074639 is an equidigital number, since it uses as much as digits as its factorization.

135639074639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 56.

The spelling of 135639074639 in words is "one hundred thirty-five billion, six hundred thirty-nine million, seventy-four thousand, six hundred thirty-nine".