51294790218 has 64 divisors (see below), whose sum is σ = 118836264960. Its totient is φ = 14457111552.

The previous prime is 51294790177. The next prime is 51294790223. The reversal of 51294790218 is 81209749215.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4031655 + ... + 4044357.

It is an arithmetic number, because the mean of its divisors is an integer number (1856816640).

Almost surely, 2^51294790218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51294790218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59418132480).

51294790218 is an abundant number, since it is smaller than the sum of its proper divisors (67541474742).

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

51294790218 is a wasteful number, since it uses less digits than its factorization.

51294790218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011.

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 51294790218 in words is "fifty-one billion, two hundred ninety-four million, seven hundred ninety thousand, two hundred eighteen".