51780117756548 has 48 divisors (see below), whose sum is σ = 96755710187136. Its totient is φ = 24188047994880.

The previous prime is 51780117756547. The next prime is 51780117756589. The reversal of 51780117756548 is 84565771108715.

It is not an unprimeable number, because it can be changed into a prime (51780117756547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341299268 + ... + 341450948.

It is an arithmetic number, because the mean of its divisors is an integer number (2015743962232).

Almost surely, 2^{51780117756548} is an apocalyptic number.

It is an amenable number.

51780117756548 is a deficient number, since it is larger than the sum of its proper divisors (44975592430588).

51780117756548 is a wasteful number, since it uses less digits than its factorization.

51780117756548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238044 (or 238042 counting only the distinct ones).

The product of its (nonzero) digits is 65856000, while the sum is 65.

The spelling of 51780117756548 in words is "fifty-one trillion, seven hundred eighty billion, one hundred seventeen million, seven hundred fifty-six thousand, five hundred forty-eight".