51678209789976 has 256 divisors, whose sum is σ = 172466236800000. Its totient is φ = 12491380408320.

The previous prime is 51678209789963. The next prime is 51678209790071. The reversal of 51678209789976 is 67998790287615.

It is a Harshad number since it is a multiple of its sum of digits (84).

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, 6445351 + ... + 12037398.

It is an arithmetic number, because the mean of its divisors is an integer number (673696237500).

Almost surely, 2^{51678209789976} is an apocalyptic number.

51678209789976 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51678209789976 is an abundant number, since it is smaller than the sum of its proper divisors (120788027010024).

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

51678209789976 is a wasteful number, since it uses less digits than its factorization.

51678209789976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482882 (or 18482878 counting only the distinct ones).

The product of its (nonzero) digits is 5761082880, while the sum is 84.

The spelling of 51678209789976 in words is "fifty-one trillion, six hundred seventy-eight billion, two hundred nine million, seven hundred eighty-nine thousand, nine hundred seventy-six".