51778078 has 24 divisors (see below), whose sum is σ = 89870760. Its totient is φ = 22294800.

The previous prime is 51778061. The next prime is 51778093. The reversal of 51778078 is 87087715.

It is a happy number.

It is a super-2 number, since 2×51778078² = 5361938722748168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1033 + ... + 10228.

It is an arithmetic number, because the mean of its divisors is an integer number (3744615).

Almost surely, 2^51778078 is an apocalyptic number.

51778078 is a deficient number, since it is larger than the sum of its proper divisors (38092682).

51778078 is a wasteful number, since it uses less digits than its factorization.

51778078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304 (or 11293 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 43.

The square root of 51778078 is about 7195.6985762329. The cubic root of 51778078 is about 372.7193801044.

The spelling of 51778078 in words is "fifty-one million, seven hundred seventy-eight thousand, seventy-eight".