2551553779 has 8 divisors (see below), whose sum is σ = 2638219248. Its totient is φ = 2466051840.

The previous prime is 2551553773. The next prime is 2551553791. The reversal of 2551553779 is 9773551552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2551553779 - 2⁵ = 2551553747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551553773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286422 + ... + 295195.

It is an arithmetic number, because the mean of its divisors is an integer number (329777406).

Almost surely, 2^2551553779 is an apocalyptic number.

2551553779 is a deficient number, since it is larger than the sum of its proper divisors (86665469).

2551553779 is a wasteful number, since it uses less digits than its factorization.

2551553779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581765.

The product of its digits is 1653750, while the sum is 49.

The square root of 2551553779 is about 50512.9070535442. The cubic root of 2551553779 is about 1366.4746377891.

The spelling of 2551553779 in words is "two billion, five hundred fifty-one million, five hundred fifty-three thousand, seven hundred seventy-nine".