51063665408 has 144 divisors (see below), whose sum is σ = 124067039040. Its totient is φ = 20475936768.

The previous prime is 51063665407. The next prime is 51063665431. The reversal of 51063665408 is 80456636015.

It is not an unprimeable number, because it can be changed into a prime (51063665407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5265428 + ... + 5275116.

It is an arithmetic number, because the mean of its divisors is an integer number (861576660).

Almost surely, 2^51063665408 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 51063665408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62033519520).

51063665408 is an abundant number, since it is smaller than the sum of its proper divisors (73003373632).

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

51063665408 is a wasteful number, since it uses less digits than its factorization.

51063665408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9902 (or 9888 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 51063665408 in words is "fifty-one billion, sixty-three million, six hundred sixty-five thousand, four hundred eight".