51326531463 has 4 divisors (see below), whose sum is σ = 68435375288. Its totient is φ = 34217687640.

The previous prime is 51326531447. The next prime is 51326531497. The reversal of 51326531463 is 36413562315.

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

It is not a de Polignac number, because 51326531463 - 2⁴ = 51326531447 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 (51326531863) 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, 8554421908 + ... + 8554421913.

It is an arithmetic number, because the mean of its divisors is an integer number (17108843822).

Almost surely, 2^51326531463 is an apocalyptic number.

51326531463 is a deficient number, since it is larger than the sum of its proper divisors (17108843825).

51326531463 is a wasteful number, since it uses less digits than its factorization.

51326531463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17108843824.

The product of its digits is 194400, while the sum is 39.

The spelling of 51326531463 in words is "fifty-one billion, three hundred twenty-six million, five hundred thirty-one thousand, four hundred sixty-three".