51738745091 has 4 divisors (see below), whose sum is σ = 56442267384. Its totient is φ = 47035222800.

The previous prime is 51738745073. The next prime is 51738745117. The reversal of 51738745091 is 19054783715.

It is a happy number.

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 51738745091 - 2²⁶ = 51671636227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51738745991) 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, 2351761130 + ... + 2351761151.

It is an arithmetic number, because the mean of its divisors is an integer number (14110566846).

Almost surely, 2^51738745091 is an apocalyptic number.

51738745091 is a deficient number, since it is larger than the sum of its proper divisors (4703522293).

51738745091 is a wasteful number, since it uses less digits than its factorization.

51738745091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703522292.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 51738745091 in words is "fifty-one billion, seven hundred thirty-eight million, seven hundred forty-five thousand, ninety-one".