51660516736 has 16 divisors (see below), whose sum is σ = 102917435940. Its totient is φ = 25830258304.

The previous prime is 51660516709. The next prime is 51660516749. The reversal of 51660516736 is 63761506615.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201798766 + ... + 201799021.

Almost surely, 2^51660516736 is an apocalyptic number.

It is an amenable number.

51660516736 is a deficient number, since it is larger than the sum of its proper divisors (51256919204).

51660516736 is an equidigital number, since it uses as much as digits as its factorization.

51660516736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403597801 (or 403597789 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 51660516736 in words is "fifty-one billion, six hundred sixty million, five hundred sixteen thousand, seven hundred thirty-six".