2126400849 has 8 divisors (see below), whose sum is σ = 3150223520. Its totient is φ = 1417600548.

The previous prime is 2126400839. The next prime is 2126400877. The reversal of 2126400849 is 9480046212.

2126400849 is a `hidden beast` number, since 2 + 1 + 2 + 640 + 0 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 2126400849 - 2⁴ = 2126400833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2126400839) 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 7 ways as a sum of consecutive naturals, for example, 39377767 + ... + 39377820.

It is an arithmetic number, because the mean of its divisors is an integer number (393777940).

Almost surely, 2^2126400849 is an apocalyptic number.

It is an amenable number.

2126400849 is a deficient number, since it is larger than the sum of its proper divisors (1023822671).

2126400849 is an equidigital number, since it uses as much as digits as its factorization.

2126400849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78755596 (or 78755590 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2126400849 is about 46112.9141239198. The cubic root of 2126400849 is about 1285.9232412925.

The spelling of 2126400849 in words is "two billion, one hundred twenty-six million, four hundred thousand, eight hundred forty-nine".