1639268074079 has 4 divisors (see below), whose sum is σ = 1639272797976. Its totient is φ = 1639263350184.

The previous prime is 1639268073991. The next prime is 1639268074097. The reversal of 1639268074079 is 9704708629361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1639268074079 - 2²⁸ = 1638999638623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639268074679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796264 + ... + 2550509.

It is an arithmetic number, because the mean of its divisors is an integer number (409818199494).

Almost surely, 2^{1639268074079} is an apocalyptic number.

1639268074079 is a deficient number, since it is larger than the sum of its proper divisors (4723897).

1639268074079 is an equidigital number, since it uses as much as digits as its factorization.

1639268074079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723896.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 1639268074079 in words is "one trillion, six hundred thirty-nine billion, two hundred sixty-eight million, seventy-four thousand, seventy-nine".