51966944534 has 4 divisors (see below), whose sum is σ = 77950416804. Its totient is φ = 25983472266.

The previous prime is 51966944507. The next prime is 51966944567. The reversal of 51966944534 is 43544966915.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51966944534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12991736132 + ... + 12991736135.

It is an arithmetic number, because the mean of its divisors is an integer number (19487604201).

Almost surely, 2^51966944534 is an apocalyptic number.

51966944534 is a deficient number, since it is larger than the sum of its proper divisors (25983472270).

51966944534 is a wasteful number, since it uses less digits than its factorization.

51966944534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25983472269.

The product of its digits is 13996800, while the sum is 56.

The spelling of 51966944534 in words is "fifty-one billion, nine hundred sixty-six million, nine hundred forty-four thousand, five hundred thirty-four".