51923421185 has 4 divisors (see below), whose sum is σ = 62308105428. Its totient is φ = 41538736944.

The previous prime is 51923421167. The next prime is 51923421257. The reversal of 51923421185 is 58112432915.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28279130896 + 23644290289 = 168164^2 + 153767^2 .

It is a cyclic number.

It is not a de Polignac number, because 51923421185 - 2⁸ = 51923420929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5192342114 + ... + 5192342123.

It is an arithmetic number, because the mean of its divisors is an integer number (15577026357).

Almost surely, 2^51923421185 is an apocalyptic number.

It is an amenable number.

51923421185 is a deficient number, since it is larger than the sum of its proper divisors (10384684243).

51923421185 is a wasteful number, since it uses less digits than its factorization.

51923421185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384684242.

The product of its digits is 86400, while the sum is 41.

The spelling of 51923421185 in words is "fifty-one billion, nine hundred twenty-three million, four hundred twenty-one thousand, one hundred eighty-five".