2551566046 has 4 divisors (see below), whose sum is σ = 3827349072. Its totient is φ = 1275783022.

The previous prime is 2551566037. The next prime is 2551566077. The reversal of 2551566046 is 6406651552.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 637891510 + ... + 637891513.

It is an arithmetic number, because the mean of its divisors is an integer number (956837268).

Almost surely, 2^2551566046 is an apocalyptic number.

2551566046 is a deficient number, since it is larger than the sum of its proper divisors (1275783026).

2551566046 is a wasteful number, since it uses less digits than its factorization.

2551566046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275783025.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 2551566046 is about 50513.0284778096. The cubic root of 2551566046 is about 1366.4768276336.

The spelling of 2551566046 in words is "two billion, five hundred fifty-one million, five hundred sixty-six thousand, forty-six".