51082000644 has 48 divisors (see below), whose sum is σ = 122437280448. Its totient is φ = 16563811968.

The previous prime is 51082000643. The next prime is 51082000657. The reversal of 51082000644 is 44600028015.

51082000644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51082000643) 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, 3225754 + ... + 3241550.

It is an arithmetic number, because the mean of its divisors is an integer number (2550776676).

Almost surely, 2^51082000644 is an apocalyptic number.

It is an amenable number.

51082000644 is an abundant number, since it is smaller than the sum of its proper divisors (71355279804).

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

51082000644 is a wasteful number, since it uses less digits than its factorization.

With its successor (51082000645) it forms an eRAP, since the sums of their prime factors are consecutive (23124 and 23125).

51082000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23124 (or 23122 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 51082000644 its reverse (44600028015), we get a palindrome (95682028659).

The spelling of 51082000644 in words is "fifty-one billion, eighty-two million, six hundred forty-four", and thus it is an aban number.