51337717440 has 112 divisors (see below), whose sum is σ = 163586537952. Its totient is φ = 13640564736.

The previous prime is 51337717439. The next prime is 51337717469. The reversal of 51337717440 is 4471773315.

It is a super-2 number, since 2×51337717440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51337717392 and 51337717401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169392 + ... + 362448.

Almost surely, 2^51337717440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51337717440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81793268976).

51337717440 is an abundant number, since it is smaller than the sum of its proper divisors (112248820512).

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

51337717440 is a wasteful number, since it uses less digits than its factorization.

51337717440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193354 (or 193344 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 51337717440 in words is "fifty-one billion, three hundred thirty-seven million, seven hundred seventeen thousand, four hundred forty".