51749828668 has 12 divisors (see below), whose sum is σ = 90580372960. Its totient is φ = 25869722112.

The previous prime is 51749828623. The next prime is 51749828671. The reversal of 51749828668 is 86682894715.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275588 + ... + 1315531.

Almost surely, 2^51749828668 is an apocalyptic number.

It is an amenable number.

51749828668 is a deficient number, since it is larger than the sum of its proper divisors (38830544292).

51749828668 is a wasteful number, since it uses less digits than its factorization.

51749828668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596116 (or 2596114 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 64.

The spelling of 51749828668 in words is "fifty-one billion, seven hundred forty-nine million, eight hundred twenty-eight thousand, six hundred sixty-eight".