51994810608 has 40 divisors (see below), whose sum is σ = 144652231248. Its totient is φ = 15998403072.

The previous prime is 51994810603. The next prime is 51994810627. The reversal of 51994810608 is 80601849915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51994810603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41661885 + ... + 41663132.

Almost surely, 2^51994810608 is an apocalyptic number.

It is an amenable number.

51994810608 is an abundant number, since it is smaller than the sum of its proper divisors (92657420640).

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

51994810608 is a wasteful number, since it uses less digits than its factorization.

51994810608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83325041 (or 83325035 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 51994810608 in words is "fifty-one billion, nine hundred ninety-four million, eight hundred ten thousand, six hundred eight".