51966944506 has 4 divisors (see below), whose sum is σ = 77950416762. Its totient is φ = 25983472252.

The previous prime is 51966944501. The next prime is 51966944507. The reversal of 51966944506 is 60544966915.

51966944506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44026530625 + 7940413881 = 209825^2 + 89109^2 .

It is not an unprimeable number, because it can be changed into a prime (51966944501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12991736125 + ... + 12991736128.

Almost surely, 2^51966944506 is an apocalyptic number.

51966944506 is a deficient number, since it is larger than the sum of its proper divisors (25983472256).

51966944506 is a wasteful number, since it uses less digits than its factorization.

51966944506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25983472255.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 51966944506 in words is "fifty-one billion, nine hundred sixty-six million, nine hundred forty-four thousand, five hundred six".