127878028506 has 32 divisors (see below), whose sum is σ = 284191130880. Its totient is φ = 42623349408.

The previous prime is 127878028501. The next prime is 127878028547. The reversal of 127878028506 is 605820878721.

127878028506 is a `hidden beast` number, since 127 + 8 + 7 + 8 + 0 + 2 + 8 + 506 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (127878028501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 922750 + ... + 1052246.

It is an arithmetic number, because the mean of its divisors is an integer number (8880972840).

Almost surely, 2^127878028506 is an apocalyptic number.

127878028506 is an abundant number, since it is smaller than the sum of its proper divisors (156313102374).

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

127878028506 is a wasteful number, since it uses less digits than its factorization.

127878028506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147795 (or 147789 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 127878028506 in words is "one hundred twenty-seven billion, eight hundred seventy-eight million, twenty-eight thousand, five hundred six".