51677765392878 has 24 divisors (see below), whose sum is σ = 111985854084000. Its totient is φ = 17223250659264.

The previous prime is 51677765392837. The next prime is 51677765392921. The reversal of 51677765392878 is 87829356777615.

51677765392878 is a `hidden beast` number, since 5 + 1 + 6 + 7 + 7 + 7 + 6 + 539 + 2 + 8 + 78 = 666.

51677765392878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51677765392797 and 51677765392806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222475558 + ... + 222707721.

It is an arithmetic number, because the mean of its divisors is an integer number (4666077253500).

Almost surely, 2^{51677765392878} is an apocalyptic number.

51677765392878 is an abundant number, since it is smaller than the sum of its proper divisors (60308088691122).

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

51677765392878 is a wasteful number, since it uses less digits than its factorization.

51677765392878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445189736 (or 445189733 counting only the distinct ones).

The product of its digits is 7468070400, while the sum is 81.

The spelling of 51677765392878 in words is "fifty-one trillion, six hundred seventy-seven billion, seven hundred sixty-five million, three hundred ninety-two thousand, eight hundred seventy-eight".