51372738723178 has 8 divisors (see below), whose sum is σ = 77059403356068. Its totient is φ = 25686270937824.

The previous prime is 51372738723167. The next prime is 51372738723191. The reversal of 51372738723178 is 87132783727315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42103837630009 + 9268901093169 = 6488747^2 + 3044487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48557701 + ... + 49604392.

Almost surely, 2^{51372738723178} is an apocalyptic number.

51372738723178 is a deficient number, since it is larger than the sum of its proper divisors (25686664632890).

51372738723178 is a wasteful number, since it uses less digits than its factorization.

51372738723178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98423768.

The product of its digits is 82978560, while the sum is 64.

The spelling of 51372738723178 in words is "fifty-one trillion, three hundred seventy-two billion, seven hundred thirty-eight million, seven hundred twenty-three thousand, one hundred seventy-eight".