51343087680 has 560 divisors, whose sum is σ = 193420617984. Its totient is φ = 12901109760.

The previous prime is 51343087661. The next prime is 51343087711. The reversal of 51343087680 is 8678034315.

It is a super-2 number, since 2×51343087680² (a number of 22 digits) contains 22 as substring.

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 79 ways as a sum of consecutive naturals, for example, 42326754 + ... + 42327966.

Almost surely, 2^51343087680 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 51343087680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96710308992).

51343087680 is an abundant number, since it is smaller than the sum of its proper divisors (142077530304).

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

51343087680 is a wasteful number, since it uses less digits than its factorization.

51343087680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 51343087680 in words is "fifty-one billion, three hundred forty-three million, eighty-seven thousand, six hundred eighty".