51378229178 has 4 divisors (see below), whose sum is σ = 77067343770. Its totient is φ = 25689114588.

The previous prime is 51378229163. The next prime is 51378229183. The reversal of 51378229178 is 87192287315.

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

It can be written as a sum of positive squares in only one way, i.e., 50671360609 + 706868569 = 225103^2 + 26587^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12844557293 + ... + 12844557296.

Almost surely, 2^51378229178 is an apocalyptic number.

51378229178 is a deficient number, since it is larger than the sum of its proper divisors (25689114592).

51378229178 is a wasteful number, since it uses less digits than its factorization.

51378229178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25689114591.

The product of its digits is 1693440, while the sum is 53.

The spelling of 51378229178 in words is "fifty-one billion, three hundred seventy-eight million, two hundred twenty-nine thousand, one hundred seventy-eight".