2551617839 has 4 divisors (see below), whose sum is σ = 2701713024. Its totient is φ = 2401522656.

The previous prime is 2551617829. The next prime is 2551617841. The reversal of 2551617839 is 9387161552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2551617839 - 2⁸ = 2551617583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2551617793 and 2551617802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551617829) 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, 75047567 + ... + 75047600.

It is an arithmetic number, because the mean of its divisors is an integer number (675428256).

Almost surely, 2^2551617839 is an apocalyptic number.

2551617839 is a deficient number, since it is larger than the sum of its proper divisors (150095185).

2551617839 is a wasteful number, since it uses less digits than its factorization.

2551617839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150095184.

The product of its digits is 453600, while the sum is 47.

The square root of 2551617839 is about 50513.5411449247. The cubic root of 2551617839 is about 1366.4860733875.

The spelling of 2551617839 in words is "two billion, five hundred fifty-one million, six hundred seventeen thousand, eight hundred thirty-nine".