51766172147 has 4 divisors (see below), whose sum is σ = 51798875040. Its totient is φ = 51733469256.

The previous prime is 51766172119. The next prime is 51766172189. The reversal of 51766172147 is 74127166715.

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 51766172147 - 2²² = 51761977843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51766172347) 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, 16349072 + ... + 16352237.

It is an arithmetic number, because the mean of its divisors is an integer number (12949718760).

Almost surely, 2^51766172147 is an apocalyptic number.

51766172147 is a deficient number, since it is larger than the sum of its proper divisors (32702893).

51766172147 is a wasteful number, since it uses less digits than its factorization.

51766172147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32702892.

The product of its digits is 493920, while the sum is 47.

The spelling of 51766172147 in words is "fifty-one billion, seven hundred sixty-six million, one hundred seventy-two thousand, one hundred forty-seven".