2126643600349 has 2 divisors, whose sum is σ = 2126643600350. Its totient is φ = 2126643600348.

The previous prime is 2126643600293. The next prime is 2126643600379. The reversal of 2126643600349 is 9430063466212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1955158992900 + 171484607449 = 1398270^2 + 414107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2126643600349 is a prime.

It is a super-2 number, since 2×2126643600349² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2126643600299 and 2126643600308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126643600379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063321800174 + 1063321800175.

It is an arithmetic number, because the mean of its divisors is an integer number (1063321800175).

Almost surely, 2^{2126643600349} is an apocalyptic number.

It is an amenable number.

2126643600349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126643600349 is an equidigital number, since it uses as much as digits as its factorization.

2126643600349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 2126643600349 in words is "two trillion, one hundred twenty-six billion, six hundred forty-three million, six hundred thousand, three hundred forty-nine".