51776777 has 8 divisors (see below), whose sum is σ = 55829760. Its totient is φ = 47733840.

The previous prime is 51776771. The next prime is 51776819. The reversal of 51776777 is 77767715.

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 51776777 - 2¹⁸ = 51514633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51776771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10874 + ... + 14892.

It is an arithmetic number, because the mean of its divisors is an integer number (6978720).

Almost surely, 2^51776777 is an apocalyptic number.

It is an amenable number.

51776777 is a deficient number, since it is larger than the sum of its proper divisors (4052983).

51776777 is a wasteful number, since it uses less digits than its factorization.

51776777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023.

The product of its digits is 504210, while the sum is 47.

The square root of 51776777 is about 7195.6081744353. The cubic root of 51776777 is about 372.7162583715.

The spelling of 51776777 in words is "fifty-one million, seven hundred seventy-six thousand, seven hundred seventy-seven".