51663560472 has 96 divisors (see below), whose sum is σ = 140969743200. Its totient is φ = 17092680192.

The previous prime is 51663560419. The next prime is 51663560491. The reversal of 51663560472 is 27406536615.

51663560472 is a `hidden beast` number, since 5 + 1 + 6 + 6 + 35 + 604 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6222628 + ... + 6230924.

It is an arithmetic number, because the mean of its divisors is an integer number (1468434825).

Almost surely, 2^51663560472 is an apocalyptic number.

It is an amenable number.

51663560472 is an abundant number, since it is smaller than the sum of its proper divisors (89306182728).

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

51663560472 is a wasteful number, since it uses less digits than its factorization.

51663560472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945 (or 8938 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 51663560472 in words is "fifty-one billion, six hundred sixty-three million, five hundred sixty thousand, four hundred seventy-two".