49915992809 has 2 divisors, whose sum is σ = 49915992810. Its totient is φ = 49915992808.

The previous prime is 49915992691. The next prime is 49915992817. The reversal of 49915992809 is 90829951994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44752133209 + 5163859600 = 211547^2 + 71860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49915992809 is a prime.

It is not a weakly prime, because it can be changed into another prime (49915992109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24957996404 + 24957996405.

It is an arithmetic number, because the mean of its divisors is an integer number (24957996405).

Almost surely, 2^49915992809 is an apocalyptic number.

It is an amenable number.

49915992809 is a deficient number, since it is larger than the sum of its proper divisors (1).

49915992809 is an equidigital number, since it uses as much as digits as its factorization.

49915992809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 65.

The spelling of 49915992809 in words is "forty-nine billion, nine hundred fifteen million, nine hundred ninety-two thousand, eight hundred nine".