51381567163468 has 6 divisors (see below), whose sum is σ = 89917742536076. Its totient is φ = 25690783581732.

The previous prime is 51381567163439. The next prime is 51381567163477. The reversal of 51381567163468 is 86436176518315.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422695895430 + ... + 6422695895437.

Almost surely, 2^{51381567163468} is an apocalyptic number.

It is an amenable number.

51381567163468 is a deficient number, since it is larger than the sum of its proper divisors (38536175372608).

51381567163468 is a wasteful number, since it uses less digits than its factorization.

51381567163468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12845391790871 (or 12845391790869 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 64.

The spelling of 51381567163468 in words is "fifty-one trillion, three hundred eighty-one billion, five hundred sixty-seven million, one hundred sixty-three thousand, four hundred sixty-eight".