51612512668 has 12 divisors (see below), whose sum is σ = 91198809520. Its totient is φ = 25555709952.

The previous prime is 51612512659. The next prime is 51612512687. The reversal of 51612512668 is 86621521615.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 62636133 + ... + 62636956.

Almost surely, 2^51612512668 is an apocalyptic number.

It is an amenable number.

51612512668 is a deficient number, since it is larger than the sum of its proper divisors (39586296852).

51612512668 is a wasteful number, since it uses less digits than its factorization.

51612512668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125273196 (or 125273194 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The spelling of 51612512668 in words is "fifty-one billion, six hundred twelve million, five hundred twelve thousand, six hundred sixty-eight".