51440647182 has 16 divisors (see below), whose sum is σ = 103691384832. Its totient is φ = 17011867320.

The previous prime is 51440647121. The next prime is 51440647199. The reversal of 51440647182 is 28174604415.

It is a super-2 number, since 2×51440647182² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 33752944 + ... + 33754467.

It is an arithmetic number, because the mean of its divisors is an integer number (6480711552).

Almost surely, 2^51440647182 is an apocalyptic number.

51440647182 is an abundant number, since it is smaller than the sum of its proper divisors (52250737650).

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

51440647182 is a wasteful number, since it uses less digits than its factorization.

51440647182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67507543.

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 51440647182 in words is "fifty-one billion, four hundred forty million, six hundred forty-seven thousand, one hundred eighty-two".