129574478056 has 16 divisors (see below), whose sum is σ = 242970682500. Its totient is φ = 64782296064.

The previous prime is 129574478039. The next prime is 129574478101. The reversal of 129574478056 is 650874475921.

It can be written as a sum of positive squares in 2 ways, for example, as 125433555556 + 4140922500 = 354166^2 + 64350^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505255 + ... + 717238.

Almost surely, 2^129574478056 is an apocalyptic number.

It is an amenable number.

129574478056 is a deficient number, since it is larger than the sum of its proper divisors (113396204444).

129574478056 is a wasteful number, since it uses less digits than its factorization.

129574478056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235748 (or 1235744 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 58.

The spelling of 129574478056 in words is "one hundred twenty-nine billion, five hundred seventy-four million, four hundred seventy-eight thousand, fifty-six".