51181818486 has 8 divisors (see below), whose sum is σ = 102363636984. Its totient is φ = 17060606160.

The previous prime is 51181818449. The next prime is 51181818487. The reversal of 51181818486 is 68481818115.

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

51181818486 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51181818487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4265151535 + ... + 4265151546.

It is an arithmetic number, because the mean of its divisors is an integer number (12795454623).

Almost surely, 2^51181818486 is an apocalyptic number.

51181818486 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51181818486 is a wasteful number, since it uses less digits than its factorization.

51181818486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530303086.

The product of its digits is 491520, while the sum is 51.

The spelling of 51181818486 in words is "fifty-one billion, one hundred eighty-one million, eight hundred eighteen thousand, four hundred eighty-six".