51263453623 has 4 divisors (see below), whose sum is σ = 51267289528. Its totient is φ = 51259617720.

The previous prime is 51263453603. The next prime is 51263453693. The reversal of 51263453623 is 32635436215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51263453623 is a prime.

It is a super-3 number, since 3×51263453623³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263453603) 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, 1897836 + ... + 1924657.

It is an arithmetic number, because the mean of its divisors is an integer number (12816822382).

Almost surely, 2^51263453623 is an apocalyptic number.

51263453623 is a deficient number, since it is larger than the sum of its proper divisors (3835905).

51263453623 is a wasteful number, since it uses less digits than its factorization.

51263453623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835904.

The product of its digits is 388800, while the sum is 40.

Adding to 51263453623 its reverse (32635436215), we get a palindrome (83898889838).

The spelling of 51263453623 in words is "fifty-one billion, two hundred sixty-three million, four hundred fifty-three thousand, six hundred twenty-three".