51173774736 has 160 divisors (see below), whose sum is σ = 153038204928. Its totient is φ = 14432808960.

The previous prime is 51173774711. The next prime is 51173774747. The reversal of 51173774736 is 63747737115.

It is a happy number.

51173774736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14045331 + ... + 14048973.

Almost surely, 2^51173774736 is an apocalyptic number.

51173774736 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51173774736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76519102464).

51173774736 is an abundant number, since it is smaller than the sum of its proper divisors (101864430192).

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

51173774736 is a wasteful number, since it uses less digits than its factorization.

51173774736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189 (or 4183 counting only the distinct ones).

The product of its digits is 2593080, while the sum is 51.

The spelling of 51173774736 in words is "fifty-one billion, one hundred seventy-three million, seven hundred seventy-four thousand, seven hundred thirty-six".