51674381345 has 4 divisors (see below), whose sum is σ = 62009257620. Its totient is φ = 41339505072.

The previous prime is 51674381333. The next prime is 51674381371. The reversal of 51674381345 is 54318347615.

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 24774445201 + 26899936144 = 157399^2 + 164012^2 .

It is a cyclic number.

It is not a de Polignac number, because 51674381345 - 2⁴ = 51674381329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51674381345.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5167438130 + ... + 5167438139.

It is an arithmetic number, because the mean of its divisors is an integer number (15502314405).

Almost surely, 2^51674381345 is an apocalyptic number.

It is an amenable number.

51674381345 is a deficient number, since it is larger than the sum of its proper divisors (10334876275).

51674381345 is a wasteful number, since it uses less digits than its factorization.

51674381345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334876274.

The product of its digits is 1209600, while the sum is 47.

The spelling of 51674381345 in words is "fifty-one billion, six hundred seventy-four million, three hundred eighty-one thousand, three hundred forty-five".