51030646664 has 32 divisors (see below), whose sum is σ = 100571397120. Its totient is φ = 24227803776.

The previous prime is 51030646661. The next prime is 51030646721. The reversal of 51030646664 is 46664603015.

It is not an unprimeable number, because it can be changed into a prime (51030646661) 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, 986984 + ... + 1037399.

It is an arithmetic number, because the mean of its divisors is an integer number (3142856160).

Almost surely, 2^51030646664 is an apocalyptic number.

It is an amenable number.

51030646664 is a deficient number, since it is larger than the sum of its proper divisors (49540750456).

51030646664 is a wasteful number, since it uses less digits than its factorization.

51030646664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024549 (or 2024545 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 51030646664 in words is "fifty-one billion, thirty million, six hundred forty-six thousand, six hundred sixty-four".