2551697078 has 16 divisors (see below), whose sum is σ = 4393445280. Its totient is φ = 1088807616.

The previous prime is 2551697063. The next prime is 2551697101. The reversal of 2551697078 is 8707961552.

It is a super-2 number, since 2×2551697078² = 13022315955747476168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 394751 + ... + 401162.

It is an arithmetic number, because the mean of its divisors is an integer number (274590330).

Almost surely, 2^2551697078 is an apocalyptic number.

2551697078 is a deficient number, since it is larger than the sum of its proper divisors (1841748202).

2551697078 is a wasteful number, since it uses less digits than its factorization.

2551697078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796151.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The square root of 2551697078 is about 50514.3254730774. The cubic root of 2551697078 is about 1366.5002183831.

The spelling of 2551697078 in words is "two billion, five hundred fifty-one million, six hundred ninety-seven thousand, seventy-eight".