51855325436 has 6 divisors (see below), whose sum is σ = 90746819520. Its totient is φ = 25927662716.

The previous prime is 51855325421. The next prime is 51855325463. The reversal of 51855325436 is 63452355815.

It is a happy number.

51855325436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6481915676 + ... + 6481915683.

It is an arithmetic number, because the mean of its divisors is an integer number (15124469920).

Almost surely, 2^51855325436 is an apocalyptic number.

It is an amenable number.

51855325436 is a deficient number, since it is larger than the sum of its proper divisors (38891494084).

51855325436 is a wasteful number, since it uses less digits than its factorization.

51855325436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12963831363 (or 12963831361 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 47.

The spelling of 51855325436 in words is "fifty-one billion, eight hundred fifty-five million, three hundred twenty-five thousand, four hundred thirty-six".