129448243816 has 32 divisors (see below), whose sum is σ = 255563330400. Its totient is φ = 61299979200.

The previous prime is 129448243781. The next prime is 129448243817. The reversal of 129448243816 is 618342844921.

It is not an unprimeable number, because it can be changed into a prime (129448243817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416491 + ... + 657541.

It is an arithmetic number, because the mean of its divisors is an integer number (7986354075).

Almost surely, 2^129448243816 is an apocalyptic number.

It is an amenable number.

129448243816 is a deficient number, since it is larger than the sum of its proper divisors (126115086584).

129448243816 is a wasteful number, since it uses less digits than its factorization.

129448243816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244609 (or 244605 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The spelling of 129448243816 in words is "one hundred twenty-nine billion, four hundred forty-eight million, two hundred forty-three thousand, eight hundred sixteen".