51818204065 has 8 divisors (see below), whose sum is σ = 62629197120. Its totient is φ = 41156328432.

The previous prime is 51818204057. The next prime is 51818204071. The reversal of 51818204065 is 56040281815.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51818204065 - 2³ = 51818204057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37278589 + ... + 37279978.

It is an arithmetic number, because the mean of its divisors is an integer number (7828649640).

Almost surely, 2^51818204065 is an apocalyptic number.

It is an amenable number.

51818204065 is a deficient number, since it is larger than the sum of its proper divisors (10810993055).

51818204065 is a wasteful number, since it uses less digits than its factorization.

51818204065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74558711.

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 51818204065 in words is "fifty-one billion, eight hundred eighteen million, two hundred four thousand, sixty-five".