51634344647 has 12 divisors (see below), whose sum is σ = 56621912256. Its totient is φ = 46921257600.

The previous prime is 51634344611. The next prime is 51634344677. The reversal of 51634344647 is 74644343615.

It is not a de Polignac number, because 51634344647 - 2¹⁰ = 51634343623 is a prime.

It is a super-2 number, since 2×51634344647² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51634344677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791479 + ... + 1820072.

It is an arithmetic number, because the mean of its divisors is an integer number (4718492688).

Almost surely, 2^51634344647 is an apocalyptic number.

51634344647 is a deficient number, since it is larger than the sum of its proper divisors (4987567609).

51634344647 is a wasteful number, since it uses less digits than its factorization.

51634344647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611626 (or 3611597 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 47.

The spelling of 51634344647 in words is "fifty-one billion, six hundred thirty-four million, three hundred forty-four thousand, six hundred forty-seven".