51954727187 has 4 divisors (see below), whose sum is σ = 56677884216. Its totient is φ = 47231570160.

The previous prime is 51954727177. The next prime is 51954727189. The reversal of 51954727187 is 78172745915.

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 51954727187 - 2⁸ = 51954726931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51954727189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2361578498 + ... + 2361578519.

It is an arithmetic number, because the mean of its divisors is an integer number (14169471054).

Almost surely, 2^51954727187 is an apocalyptic number.

51954727187 is a deficient number, since it is larger than the sum of its proper divisors (4723157029).

51954727187 is a wasteful number, since it uses less digits than its factorization.

51954727187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723157028.

The product of its digits is 4939200, while the sum is 56.

The spelling of 51954727187 in words is "fifty-one billion, nine hundred fifty-four million, seven hundred twenty-seven thousand, one hundred eighty-seven".