51424255663 has 4 divisors (see below), whose sum is σ = 56099188008. Its totient is φ = 46749323320.

The previous prime is 51424255613. The next prime is 51424255679. The reversal of 51424255663 is 36655242415.

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

It is a cyclic number.

It is not a de Polignac number, because 51424255663 - 2⁹ = 51424255151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51424255613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2337466156 + ... + 2337466177.

It is an arithmetic number, because the mean of its divisors is an integer number (14024797002).

Almost surely, 2^51424255663 is an apocalyptic number.

51424255663 is a deficient number, since it is larger than the sum of its proper divisors (4674932345).

51424255663 is a wasteful number, since it uses less digits than its factorization.

51424255663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674932344.

The product of its digits is 864000, while the sum is 43.

The spelling of 51424255663 in words is "fifty-one billion, four hundred twenty-four million, two hundred fifty-five thousand, six hundred sixty-three".