51285723606 has 48 divisors (see below), whose sum is σ = 122900943984. Its totient is φ = 15353727552.

The previous prime is 51285723581. The next prime is 51285723613. The reversal of 51285723606 is 60632758215.

51285723606 is a `hidden beast` number, since 5 + 1 + 285 + 7 + 2 + 360 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2953096 + ... + 2970411.

It is an arithmetic number, because the mean of its divisors is an integer number (2560436333).

Almost surely, 2^51285723606 is an apocalyptic number.

51285723606 is an abundant number, since it is smaller than the sum of its proper divisors (71615220378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51285723606 is a wasteful number, since it uses less digits than its factorization.

51285723606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923565 (or 5923562 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 51285723606 in words is "fifty-one billion, two hundred eighty-five million, seven hundred twenty-three thousand, six hundred six".