51812683776 has 832 divisors, whose sum is σ = 193249935360. Its totient is φ = 13377208320.

The previous prime is 51812683751. The next prime is 51812683787. The reversal of 51812683776 is 67738621815.

It is a happy number.

51812683776 is a `hidden beast` number, since 5 + 1 + 8 + 1 + 268 + 377 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 407973825 + ... + 407973951.

Almost surely, 2^51812683776 is an apocalyptic number.

51812683776 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51812683776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96624967680).

51812683776 is an abundant number, since it is smaller than the sum of its proper divisors (141437251584).

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

51812683776 is a wasteful number, since it uses less digits than its factorization.

51812683776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 187 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 51812683776 in words is "fifty-one billion, eight hundred twelve million, six hundred eighty-three thousand, seven hundred seventy-six".