51761778 has 16 divisors (see below), whose sum is σ = 103596096. Its totient is φ = 17241840.

The previous prime is 51761767. The next prime is 51761783. The reversal of 51761778 is 87716715.

51761778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12000 + ... + 15732.

It is an arithmetic number, because the mean of its divisors is an integer number (6474756).

Almost surely, 2^51761778 is an apocalyptic number.

51761778 is an abundant number, since it is smaller than the sum of its proper divisors (51834318).

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

51761778 is a wasteful number, since it uses less digits than its factorization.

51761778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6049.

The product of its digits is 82320, while the sum is 42.

The square root of 51761778 is about 7194.5658659852. The cubic root of 51761778 is about 372.6802646862.

The spelling of 51761778 in words is "fifty-one million, seven hundred sixty-one thousand, seven hundred seventy-eight".