51661773224 has 64 divisors (see below), whose sum is σ = 105712992000. Its totient is φ = 23575345920.

The previous prime is 51661773223. The next prime is 51661773269. The reversal of 51661773224 is 42237716615.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51661773223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019377 + ... + 2044799.

It is an arithmetic number, because the mean of its divisors is an integer number (1651765500).

Almost surely, 2^51661773224 is an apocalyptic number.

It is an amenable number.

51661773224 is an abundant number, since it is smaller than the sum of its proper divisors (54051218776).

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

51661773224 is a wasteful number, since it uses less digits than its factorization.

51661773224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25938 (or 25934 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The spelling of 51661773224 in words is "fifty-one billion, six hundred sixty-one million, seven hundred seventy-three thousand, two hundred twenty-four".