51913318608 has 120 divisors (see below), whose sum is σ = 159529039488. Its totient is φ = 16286510592.

The previous prime is 51913318603. The next prime is 51913318609. The reversal of 51913318608 is 80681331915.

It is a happy number.

51913318608 is a `hidden beast` number, since 5 + 1 + 9 + 1 + 3 + 31 + 8 + 608 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51913318603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326616 + ... + 458807.

Almost surely, 2^51913318608 is an apocalyptic number.

It is an amenable number.

51913318608 is an abundant number, since it is smaller than the sum of its proper divisors (107615720880).

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

51913318608 is a wasteful number, since it uses less digits than its factorization.

51913318608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785463 (or 785445 counting only the distinct ones).

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

The spelling of 51913318608 in words is "fifty-one billion, nine hundred thirteen million, three hundred eighteen thousand, six hundred eight".