51543663732 has 108 divisors (see below), whose sum is σ = 143297535108. Its totient is φ = 15610003200.

The previous prime is 51543663727. The next prime is 51543663737. The reversal of 51543663732 is 23736634515.

It is a happy number.

51543663732 is a `hidden beast` number, since 5 + 1 + 5 + 4 + 3 + 6 + 637 + 3 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (51543663727) and next prime (51543663737).

It can be written as a sum of positive squares in 2 ways, for example, as 31426780176 + 20116883556 = 177276^2 + 141834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543663737) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12094482 + ... + 12098742.

Almost surely, 2^51543663732 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 51543663732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71648767554).

51543663732 is an abundant number, since it is smaller than the sum of its proper divisors (91753871376).

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

51543663732 is a wasteful number, since it uses less digits than its factorization.

51543663732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7054 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 45.

The spelling of 51543663732 in words is "fifty-one billion, five hundred forty-three million, six hundred sixty-three thousand, seven hundred thirty-two".