51180161923 has 4 divisors (see below), whose sum is σ = 55832903928. Its totient is φ = 46527419920.

The previous prime is 51180161917. The next prime is 51180161939. The reversal of 51180161923 is 32916108115.

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 51180161923 - 2⁹ = 51180161411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51180161023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2326370986 + ... + 2326371007.

It is an arithmetic number, because the mean of its divisors is an integer number (13958225982).

Almost surely, 2^51180161923 is an apocalyptic number.

51180161923 is a deficient number, since it is larger than the sum of its proper divisors (4652742005).

51180161923 is a wasteful number, since it uses less digits than its factorization.

51180161923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4652742004.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 51180161923 in words is "fifty-one billion, one hundred eighty million, one hundred sixty-one thousand, nine hundred twenty-three".