51027778142766 has 48 divisors (see below), whose sum is σ = 118222773194448. Its totient is φ = 15850212576000.

The previous prime is 51027778142729. The next prime is 51027778142779. The reversal of 51027778142766 is 66724187772015.

It is a happy number.

51027778142766 is a `hidden beast` number, since 5 + 1 + 0 + 2 + 7 + 77 + 81 + 427 + 66 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 825501000 + ... + 825562811.

It is an arithmetic number, because the mean of its divisors is an integer number (2462974441551).

Almost surely, 2^{51027778142766} is an apocalyptic number.

51027778142766 is an abundant number, since it is smaller than the sum of its proper divisors (67194995051682).

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

51027778142766 is a wasteful number, since it uses less digits than its factorization.

51027778142766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651063937 (or 1651063934 counting only the distinct ones).

The product of its (nonzero) digits is 55319040, while the sum is 63.

The spelling of 51027778142766 in words is "fifty-one trillion, twenty-seven billion, seven hundred seventy-eight million, one hundred forty-two thousand, seven hundred sixty-six".