51851905726 has 4 divisors (see below), whose sum is σ = 77777858592. Its totient is φ = 25925952862.

The previous prime is 51851905669. The next prime is 51851905733. The reversal of 51851905726 is 62750915815.

51851905726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51851905726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12962976430 + ... + 12962976433.

It is an arithmetic number, because the mean of its divisors is an integer number (19444464648).

Almost surely, 2^51851905726 is an apocalyptic number.

51851905726 is a deficient number, since it is larger than the sum of its proper divisors (25925952866).

51851905726 is a wasteful number, since it uses less digits than its factorization.

51851905726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25925952865.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 51851905726 in words is "fifty-one billion, eight hundred fifty-one million, nine hundred five thousand, seven hundred twenty-six".