51661342224 has 60 divisors (see below), whose sum is σ = 144626907100. Its totient is φ = 17214861312.

The previous prime is 51661342181. The next prime is 51661342237. The reversal of 51661342224 is 42224316615.

51661342224 is a `hidden beast` number, since 5 + 16 + 613 + 4 + 2 + 2 + 24 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42304262400 + 9357079824 = 205680^2 + 96732^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399732 + ... + 512940.

Almost surely, 2^51661342224 is an apocalyptic number.

It is an amenable number.

51661342224 is an abundant number, since it is smaller than the sum of its proper divisors (92965564876).

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

51661342224 is a wasteful number, since it uses less digits than its factorization.

51661342224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116392 (or 116383 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 51661342224 its reverse (42224316615), we get a palindrome (93885658839).

The spelling of 51661342224 in words is "fifty-one billion, six hundred sixty-one million, three hundred forty-two thousand, two hundred twenty-four".