51116316440 has 32 divisors (see below), whose sum is σ = 131441957280. Its totient is φ = 17525594112.

The previous prime is 51116316403. The next prime is 51116316457. The reversal of 51116316440 is 4461361115.

51116316440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51116316440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51116316397 and 51116316406.

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, 91278857 + ... + 91279416.

It is an arithmetic number, because the mean of its divisors is an integer number (4107561165).

Almost surely, 2^51116316440 is an apocalyptic number.

It is an amenable number.

51116316440 is an abundant number, since it is smaller than the sum of its proper divisors (80325640840).

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

51116316440 is a wasteful number, since it uses less digits than its factorization.

51116316440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182558291 (or 182558287 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 51116316440 its reverse (4461361115), we get a palindrome (55577677555).

The spelling of 51116316440 in words is "fifty-one billion, one hundred sixteen million, three hundred sixteen thousand, four hundred forty".