51263444671 has 4 divisors (see below), whose sum is σ = 51264183312. Its totient is φ = 51262706032.

The previous prime is 51263444669. The next prime is 51263444693. The reversal of 51263444671 is 17644436215.

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 51263444671 - 2¹ = 51263444669 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 (51263444471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253006 + ... + 408091.

It is an arithmetic number, because the mean of its divisors is an integer number (12816045828).

Almost surely, 2^51263444671 is an apocalyptic number.

51263444671 is a deficient number, since it is larger than the sum of its proper divisors (738641).

51263444671 is an equidigital number, since it uses as much as digits as its factorization.

51263444671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738640.

The product of its digits is 483840, while the sum is 43.

The spelling of 51263444671 in words is "fifty-one billion, two hundred sixty-three million, four hundred forty-four thousand, six hundred seventy-one".