2553191809 has 4 divisors (see below), whose sum is σ = 2917933504. Its totient is φ = 2188450116.

The previous prime is 2553191777. The next prime is 2553191819. The reversal of 2553191809 is 9081913552.

It is a happy number.

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 2553191809 - 2⁵ = 2553191777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2553191819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182370837 + ... + 182370850.

It is an arithmetic number, because the mean of its divisors is an integer number (729483376).

Almost surely, 2^2553191809 is an apocalyptic number.

It is an amenable number.

2553191809 is a deficient number, since it is larger than the sum of its proper divisors (364741695).

2553191809 is an equidigital number, since it uses as much as digits as its factorization.

2553191809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364741694.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 2553191809 is about 50529.1184269031. The cubic root of 2553191809 is about 1366.7669887556.

The spelling of 2553191809 in words is "two billion, five hundred fifty-three million, one hundred ninety-one thousand, eight hundred nine".