51776627217 has 32 divisors (see below), whose sum is σ = 83066449920. Its totient is φ = 28023978240.

The previous prime is 51776627213. The next prime is 51776627237. The reversal of 51776627217 is 71272667715.

It is not a de Polignac number, because 51776627217 - 2² = 51776627213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51776627217.

It is not an unprimeable number, because it can be changed into a prime (51776627213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2832168 + ... + 2850390.

It is an arithmetic number, because the mean of its divisors is an integer number (2595826560).

Almost surely, 2^51776627217 is an apocalyptic number.

51776627217 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51776627217 is a deficient number, since it is larger than the sum of its proper divisors (31289822703).

51776627217 is a wasteful number, since it uses less digits than its factorization.

51776627217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25373.

The product of its digits is 1728720, while the sum is 51.

The spelling of 51776627217 in words is "fifty-one billion, seven hundred seventy-six million, six hundred twenty-seven thousand, two hundred seventeen".