127856447766 has 48 divisors (see below), whose sum is σ = 283843422720. Its totient is φ = 41572062000.

The previous prime is 127856447729. The next prime is 127856447767. The reversal of 127856447766 is 667744658721.

127856447766 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 564 + 4 + 7 + 7 + 66 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127856447767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471295 + ... + 691253.

It is an arithmetic number, because the mean of its divisors is an integer number (5913404640).

Almost surely, 2^127856447766 is an apocalyptic number.

127856447766 is an abundant number, since it is smaller than the sum of its proper divisors (155986974954).

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

127856447766 is a wasteful number, since it uses less digits than its factorization.

127856447766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220761 (or 220758 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 63.

The spelling of 127856447766 in words is "one hundred twenty-seven billion, eight hundred fifty-six million, four hundred forty-seven thousand, seven hundred sixty-six".