51581962680 has 256 divisors, whose sum is σ = 162860544000. Its totient is φ = 13053173760.

The previous prime is 51581962673. The next prime is 51581962709. The reversal of 51581962680 is 8626918515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86984464 + ... + 86985056.

It is an arithmetic number, because the mean of its divisors is an integer number (636174000).

Almost surely, 2^51581962680 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 51581962680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81430272000).

51581962680 is an abundant number, since it is smaller than the sum of its proper divisors (111278581320).

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

51581962680 is a wasteful number, since it uses less digits than its factorization.

51581962680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 51581962680 in words is "fifty-one billion, five hundred eighty-one million, nine hundred sixty-two thousand, six hundred eighty".