51185717036 has 12 divisors (see below), whose sum is σ = 89580194760. Its totient is φ = 25591375680.

The previous prime is 51185717029. The next prime is 51185717039. The reversal of 51185717036 is 63071758115.

It is not an unprimeable number, because it can be changed into a prime (51185717039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291146 + ... + 432593.

It is an arithmetic number, because the mean of its divisors is an integer number (7465016230).

Almost surely, 2^51185717036 is an apocalyptic number.

It is an amenable number.

51185717036 is a deficient number, since it is larger than the sum of its proper divisors (38394477724).

51185717036 is a wasteful number, since it uses less digits than its factorization.

51185717036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741424 (or 741422 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 51185717036 in words is "fifty-one billion, one hundred eighty-five million, seven hundred seventeen thousand, thirty-six".