51706813630 has 32 divisors (see below), whose sum is σ = 96156626688. Its totient is φ = 19998451200.

The previous prime is 51706813601. The next prime is 51706813657. The reversal of 51706813630 is 3631860715.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295494 + ... + 436726.

It is an arithmetic number, because the mean of its divisors is an integer number (3004894584).

Almost surely, 2^51706813630 is an apocalyptic number.

51706813630 is a deficient number, since it is larger than the sum of its proper divisors (44449813058).

51706813630 is a wasteful number, since it uses less digits than its factorization.

51706813630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142452.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 51706813630 in words is "fifty-one billion, seven hundred six million, eight hundred thirteen thousand, six hundred thirty".