129395278816 has 48 divisors (see below), whose sum is σ = 255851498448. Its totient is φ = 64417536000.

The previous prime is 129395278799. The next prime is 129395278849. The reversal of 129395278816 is 618872593921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11254831 + ... + 11266321.

It is an arithmetic number, because the mean of its divisors is an integer number (5330239551).

Almost surely, 2^129395278816 is an apocalyptic number.

129395278816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129395278816 is a deficient number, since it is larger than the sum of its proper divisors (126456219632).

129395278816 is a wasteful number, since it uses less digits than its factorization.

129395278816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995 (or 12987 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The spelling of 129395278816 in words is "one hundred twenty-nine billion, three hundred ninety-five million, two hundred seventy-eight thousand, eight hundred sixteen".