51785073878 has 16 divisors (see below), whose sum is σ = 77934402720. Its totient is φ = 25807009536.

The previous prime is 51785073869. The next prime is 51785073881. The reversal of 51785073878 is 87837058715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585751 + ... + 1618077.

It is an arithmetic number, because the mean of its divisors is an integer number (4870900170).

Almost surely, 2^51785073878 is an apocalyptic number.

51785073878 is a deficient number, since it is larger than the sum of its proper divisors (26149328842).

51785073878 is a wasteful number, since it uses less digits than its factorization.

51785073878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34951.

The product of its (nonzero) digits is 13171200, while the sum is 59.

The spelling of 51785073878 in words is "fifty-one billion, seven hundred eighty-five million, seventy-three thousand, eight hundred seventy-eight".