49939836922681 has 2 divisors, whose sum is σ = 49939836922682. Its totient is φ = 49939836922680.

The previous prime is 49939836922649. The next prime is 49939836922721. The reversal of 49939836922681 is 18622963893994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25007840614656 + 24931996308025 = 5000784^2 + 4993195^2 .

It is a cyclic number.

It is not a de Polignac number, because 49939836922681 - 2⁵ = 49939836922649 is a prime.

It is a super-2 number, since 2×49939836922681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49939836932681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24969918461340 + 24969918461341.

It is an arithmetic number, because the mean of its divisors is an integer number (24969918461341).

Almost surely, 2^{49939836922681} is an apocalyptic number.

It is an amenable number.

49939836922681 is a deficient number, since it is larger than the sum of its proper divisors (1).

49939836922681 is an equidigital number, since it uses as much as digits as its factorization.

49939836922681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2176782336, while the sum is 79.

The spelling of 49939836922681 in words is "forty-nine trillion, nine hundred thirty-nine billion, eight hundred thirty-six million, nine hundred twenty-two thousand, six hundred eighty-one".