49638157757 has 2 divisors, whose sum is σ = 49638157758. Its totient is φ = 49638157756.

The previous prime is 49638157717. The next prime is 49638157763. The reversal of 49638157757 is 75775183694.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27456821401 + 22181336356 = 165701^2 + 148934^2 .

It is a cyclic number.

It is not a de Polignac number, because 49638157757 - 2³² = 45343190461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49638157757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49638157717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24819078878 + 24819078879.

It is an arithmetic number, because the mean of its divisors is an integer number (24819078879).

Almost surely, 2^49638157757 is an apocalyptic number.

It is an amenable number.

49638157757 is a deficient number, since it is larger than the sum of its proper divisors (1).

49638157757 is an equidigital number, since it uses as much as digits as its factorization.

49638157757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44452800, while the sum is 62.

The spelling of 49638157757 in words is "forty-nine billion, six hundred thirty-eight million, one hundred fifty-seven thousand, seven hundred fifty-seven".