49639337669 has 2 divisors, whose sum is σ = 49639337670. Its totient is φ = 49639337668.

The previous prime is 49639337639. The next prime is 49639337689. The reversal of 49639337669 is 96673393694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41569908769 + 8069428900 = 203887^2 + 89830^2 .

It is a cyclic number.

It is not a de Polignac number, because 49639337669 - 2⁸ = 49639337413 is a prime.

It is a super-2 number, since 2×49639337669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49639337639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24819668834 + 24819668835.

It is an arithmetic number, because the mean of its divisors is an integer number (24819668835).

Almost surely, 2^49639337669 is an apocalyptic number.

It is an amenable number.

49639337669 is a deficient number, since it is larger than the sum of its proper divisors (1).

49639337669 is an equidigital number, since it uses as much as digits as its factorization.

49639337669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119042784, while the sum is 65.

The spelling of 49639337669 in words is "forty-nine billion, six hundred thirty-nine million, three hundred thirty-seven thousand, six hundred sixty-nine".