51206194908 has 72 divisors (see below), whose sum is σ = 141230574576. Its totient is φ = 15514214400.

The previous prime is 51206194901. The next prime is 51206194933. The reversal of 51206194908 is 80949160215.

51206194908 is a `hidden beast` number, since 5 + 1 + 20 + 619 + 4 + 9 + 0 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51206194901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3501660 + ... + 3516252.

It is an arithmetic number, because the mean of its divisors is an integer number (1961535758).

Almost surely, 2^51206194908 is an apocalyptic number.

It is an amenable number.

51206194908 is an abundant number, since it is smaller than the sum of its proper divisors (90024379668).

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

51206194908 is a wasteful number, since it uses less digits than its factorization.

51206194908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23475 (or 23470 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 51206194908 in words is "fifty-one billion, two hundred six million, one hundred ninety-four thousand, nine hundred eight".