49993145957 has 2 divisors, whose sum is σ = 49993145958. Its totient is φ = 49993145956.

The previous prime is 49993145911. The next prime is 49993146011. The reversal of 49993145957 is 75954139994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38541149761 + 11451996196 = 196319^2 + 107014^2 .

It is a cyclic number.

It is not a de Polignac number, because 49993145957 - 2⁶ = 49993145893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49993145893 and 49993145902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49993135957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24996572978 + 24996572979.

It is an arithmetic number, because the mean of its divisors is an integer number (24996572979).

Almost surely, 2^49993145957 is an apocalyptic number.

It is an amenable number.

49993145957 is a deficient number, since it is larger than the sum of its proper divisors (1).

49993145957 is an equidigital number, since it uses as much as digits as its factorization.

49993145957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55112400, while the sum is 65.

The spelling of 49993145957 in words is "forty-nine billion, nine hundred ninety-three million, one hundred forty-five thousand, nine hundred fifty-seven".