2126642352649 has 4 divisors (see below), whose sum is σ = 2128536069136. Its totient is φ = 2124748636164.

The previous prime is 2126642352623. The next prime is 2126642352671. The reversal of 2126642352649 is 9462532466212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2126642352649 - 2¹⁷ = 2126642221577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2126642352596 and 2126642352605.

It is not an unprimeable number, because it can be changed into a prime (2126642352619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946856559 + ... + 946858804.

It is an arithmetic number, because the mean of its divisors is an integer number (532134017284).

Almost surely, 2^{2126642352649} is an apocalyptic number.

It is an amenable number.

2126642352649 is a deficient number, since it is larger than the sum of its proper divisors (1893716487).

2126642352649 is a wasteful number, since it uses less digits than its factorization.

2126642352649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893716486.

The product of its digits is 7464960, while the sum is 52.

The spelling of 2126642352649 in words is "two trillion, one hundred twenty-six billion, six hundred forty-two million, three hundred fifty-two thousand, six hundred forty-nine".