51425064340 has 144 divisors (see below), whose sum is σ = 119858578560. Its totient is φ = 18417830400.

The previous prime is 51425064331. The next prime is 51425064343. The reversal of 51425064340 is 4346052415.

It is a junction number, because it is equal to n+sod(n) for n = 51425064296 and 51425064305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425064343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 340563265 + ... + 340563415.

It is an arithmetic number, because the mean of its divisors is an integer number (832351240).

Almost surely, 2^51425064340 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 51425064340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59929289280).

51425064340 is an abundant number, since it is smaller than the sum of its proper divisors (68433514220).

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

51425064340 is a wasteful number, since it uses less digits than its factorization.

51425064340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 51425064340 in words is "fifty-one billion, four hundred twenty-five million, sixty-four thousand, three hundred forty".