129452778807 has 16 divisors (see below), whose sum is σ = 189010914048. Its totient is φ = 78157911680.

The previous prime is 129452778803. The next prime is 129452778817. The reversal of 129452778807 is 708877254921.

It is a cyclic number.

It is not a de Polignac number, because 129452778807 - 2² = 129452778803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129452778803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7449138 + ... + 7466495.

It is an arithmetic number, because the mean of its divisors is an integer number (11813182128).

Almost surely, 2^129452778807 is an apocalyptic number.

129452778807 is a deficient number, since it is larger than the sum of its proper divisors (59558135241).

129452778807 is a wasteful number, since it uses less digits than its factorization.

129452778807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14915910.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 129452778807 in words is "one hundred twenty-nine billion, four hundred fifty-two million, seven hundred seventy-eight thousand, eight hundred seven".