51174982657 has 4 divisors (see below), whose sum is σ = 51175879380. Its totient is φ = 51174085936.

The previous prime is 51174982627. The next prime is 51174982673. The reversal of 51174982657 is 75628947115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13707960561 + 37467022096 = 117081^2 + 193564^2 .

It is a cyclic number.

It is not a de Polignac number, because 51174982657 - 2²³ = 51166594049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51174982598 and 51174982607.

It is not an unprimeable number, because it can be changed into a prime (51174982627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356482 + ... + 478987.

It is an arithmetic number, because the mean of its divisors is an integer number (12793969845).

Almost surely, 2^51174982657 is an apocalyptic number.

It is an amenable number.

51174982657 is a deficient number, since it is larger than the sum of its proper divisors (896723).

51174982657 is an equidigital number, since it uses as much as digits as its factorization.

51174982657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896722.

The product of its digits is 4233600, while the sum is 55.

The spelling of 51174982657 in words is "fifty-one billion, one hundred seventy-four million, nine hundred eighty-two thousand, six hundred fifty-seven".