2551749619 has 2 divisors, whose sum is σ = 2551749620. Its totient is φ = 2551749618.

The previous prime is 2551749601. The next prime is 2551749631. The reversal of 2551749619 is 9169471552.

It is a happy number.

2551749619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2551749619 - 2⁷ = 2551749491 is a prime.

It is a super-2 number, since 2×2551749619² = 13022852236133290322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2551749679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275874809 + 1275874810.

It is an arithmetic number, because the mean of its divisors is an integer number (1275874810).

Almost surely, 2^2551749619 is an apocalyptic number.

2551749619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551749619 is an equidigital number, since it uses as much as digits as its factorization.

2551749619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The square root of 2551749619 is about 50514.8455307942. The cubic root of 2551749619 is about 1366.5095973432.

The spelling of 2551749619 in words is "two billion, five hundred fifty-one million, seven hundred forty-nine thousand, six hundred nineteen".