51852841691 has 12 divisors (see below), whose sum is σ = 60329203560. Its totient is φ = 44437488480.

The previous prime is 51852841639. The next prime is 51852841693. The reversal of 51852841691 is 19614825815.

51852841691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51852841691 - 2³⁴ = 34672972507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51852841693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198200 + ... + 378138.

It is an arithmetic number, because the mean of its divisors is an integer number (5027433630).

Almost surely, 2^51852841691 is an apocalyptic number.

51852841691 is a deficient number, since it is larger than the sum of its proper divisors (8476361869).

51852841691 is a wasteful number, since it uses less digits than its factorization.

51852841691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185834 (or 185827 counting only the distinct ones).

The product of its digits is 691200, while the sum is 50.

The spelling of 51852841691 in words is "fifty-one billion, eight hundred fifty-two million, eight hundred forty-one thousand, six hundred ninety-one".