129057568078 has 16 divisors (see below), whose sum is σ = 195431549040. Its totient is φ = 63916560000.

The previous prime is 129057568069. The next prime is 129057568093. The reversal of 129057568078 is 870865750921.

It is a super-2 number, since 2×129057568078² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 619323 + ... + 801046.

It is an arithmetic number, because the mean of its divisors is an integer number (12214471815).

Almost surely, 2^129057568078 is an apocalyptic number.

129057568078 is a deficient number, since it is larger than the sum of its proper divisors (66373980962).

129057568078 is a wasteful number, since it uses less digits than its factorization.

129057568078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420803.

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 129057568078 in words is "one hundred twenty-nine billion, fifty-seven million, five hundred sixty-eight thousand, seventy-eight".