49117936639861 has 2 divisors, whose sum is σ = 49117936639862. Its totient is φ = 49117936639860.

The previous prime is 49117936639801. The next prime is 49117936639921. The reversal of 49117936639861 is 16893663971194.

It is a balanced prime because it is at equal distance from previous prime (49117936639801) and next prime (49117936639921).

It can be written as a sum of positive squares in only one way, i.e., 45922226240836 + 3195710399025 = 6776594^2 + 1787655^2 .

It is a cyclic number.

It is not a de Polignac number, because 49117936639861 - 2³⁹ = 48568180825973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49117936639801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24558968319930 + 24558968319931.

It is an arithmetic number, because the mean of its divisors is an integer number (24558968319931).

Almost surely, 2^{49117936639861} is an apocalyptic number.

It is an amenable number.

49117936639861 is a deficient number, since it is larger than the sum of its proper divisors (1).

49117936639861 is an equidigital number, since it uses as much as digits as its factorization.

49117936639861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317447424, while the sum is 73.

The spelling of 49117936639861 in words is "forty-nine trillion, one hundred seventeen billion, nine hundred thirty-six million, six hundred thirty-nine thousand, eight hundred sixty-one".