51650763840 has 336 divisors, whose sum is σ = 192801825216. Its totient is φ = 12615782400.

The previous prime is 51650763821. The next prime is 51650763851. The reversal of 51650763840 is 4836705615.

51650763840 is a `hidden beast` number, since 5 + 1 + 6 + 5 + 0 + 7 + 638 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4899375 + ... + 4909905.

It is an arithmetic number, because the mean of its divisors is an integer number (573814956).

Almost surely, 2^51650763840 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 51650763840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96400912608).

51650763840 is an abundant number, since it is smaller than the sum of its proper divisors (141151061376).

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

51650763840 is a wasteful number, since it uses less digits than its factorization.

51650763840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10698 (or 10685 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 51650763840 in words is "fifty-one billion, six hundred fifty million, seven hundred sixty-three thousand, eight hundred forty".