51165449463 has 4 divisors (see below), whose sum is σ = 68220599288. Its totient is φ = 34110299640.

The previous prime is 51165449453. The next prime is 51165449471. The reversal of 51165449463 is 36494456115.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-51165449463 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 (51165449453) 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, 8527574908 + ... + 8527574913.

It is an arithmetic number, because the mean of its divisors is an integer number (17055149822).

Almost surely, 2^51165449463 is an apocalyptic number.

51165449463 is a deficient number, since it is larger than the sum of its proper divisors (17055149825).

51165449463 is a wasteful number, since it uses less digits than its factorization.

51165449463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055149824.

The product of its digits is 1555200, while the sum is 48.

The spelling of 51165449463 in words is "fifty-one billion, one hundred sixty-five million, four hundred forty-nine thousand, four hundred sixty-three".