51505661676 has 96 divisors (see below), whose sum is σ = 138404915712. Its totient is φ = 14603143680.

The previous prime is 51505661659. The next prime is 51505661677. The reversal of 51505661676 is 67616650515.

It is not an unprimeable number, because it can be changed into a prime (51505661677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6040296 + ... + 6048816.

It is an arithmetic number, because the mean of its divisors is an integer number (1441717872).

Almost surely, 2^51505661676 is an apocalyptic number.

It is an amenable number.

51505661676 is an abundant number, since it is smaller than the sum of its proper divisors (86899254036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51505661676 is a wasteful number, since it uses less digits than its factorization.

51505661676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079 (or 9077 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 51505661676 in words is "fifty-one billion, five hundred five million, six hundred sixty-one thousand, six hundred seventy-six".