49856968729 has 2 divisors, whose sum is σ = 49856968730. Its totient is φ = 49856968728.

The previous prime is 49856968697. The next prime is 49856968817. The reversal of 49856968729 is 92786965894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47100718729 + 2756250000 = 217027^2 + 52500^2 .

It is a cyclic number.

It is not a de Polignac number, because 49856968729 - 2⁵ = 49856968697 is a prime.

It is not a weakly prime, because it can be changed into another prime (49856965729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24928484364 + 24928484365.

It is an arithmetic number, because the mean of its divisors is an integer number (24928484365).

Almost surely, 2^49856968729 is an apocalyptic number.

It is an amenable number.

49856968729 is a deficient number, since it is larger than the sum of its proper divisors (1).

49856968729 is an equidigital number, since it uses as much as digits as its factorization.

49856968729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470292480, while the sum is 73.

The spelling of 49856968729 in words is "forty-nine billion, eight hundred fifty-six million, nine hundred sixty-eight thousand, seven hundred twenty-nine".