51543618944 has 32 divisors (see below), whose sum is σ = 104130833040. Its totient is φ = 25408821760.

The previous prime is 51543618941. The next prime is 51543619003. The reversal of 51543618944 is 44981634515.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 51543618892 and 51543618901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543618941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2826719 + ... + 2844894.

Almost surely, 2^51543618944 is an apocalyptic number.

It is an amenable number.

51543618944 is an abundant number, since it is smaller than the sum of its proper divisors (52587214096).

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

51543618944 is an equidigital number, since it uses as much as digits as its factorization.

51543618944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671698 (or 5671686 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The spelling of 51543618944 in words is "fifty-one billion, five hundred forty-three million, six hundred eighteen thousand, nine hundred forty-four".