2126661745 has 16 divisors (see below), whose sum is σ = 2749263552. Its totient is φ = 1569908160.

The previous prime is 2126661743. The next prime is 2126661749. The reversal of 2126661745 is 5471666212.

It is a happy number.

It is not a de Polignac number, because 2126661745 - 2¹ = 2126661743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2126661698 and 2126661707.

It is not an unprimeable number, because it can be changed into a prime (2126661743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350790 + ... + 356800.

It is an arithmetic number, because the mean of its divisors is an integer number (171828972).

Almost surely, 2^2126661745 is an apocalyptic number.

It is an amenable number.

2126661745 is a deficient number, since it is larger than the sum of its proper divisors (622601807).

2126661745 is a wasteful number, since it uses less digits than its factorization.

2126661745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11472.

The product of its digits is 120960, while the sum is 40.

The square root of 2126661745 is about 46115.7429193112. The cubic root of 2126661745 is about 1285.9758307043.

The spelling of 2126661745 in words is "two billion, one hundred twenty-six million, six hundred sixty-one thousand, seven hundred forty-five".