129724755356464 has 20 divisors (see below), whose sum is σ = 251343454363360. Its totient is φ = 64861928424000.

The previous prime is 129724755356369. The next prime is 129724755356477. The reversal of 129724755356464 is 464653557427921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129724755356393 and 129724755356402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25689999 + ... + 30322030.

It is an arithmetic number, because the mean of its divisors is an integer number (12567172718168).

Almost surely, 2^{129724755356464} is an apocalyptic number.

It is an amenable number.

129724755356464 is a deficient number, since it is larger than the sum of its proper divisors (121618699006896).

129724755356464 is a wasteful number, since it uses less digits than its factorization.

129724755356464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56156788 (or 56156782 counting only the distinct ones).

The product of its digits is 1524096000, while the sum is 70.

The spelling of 129724755356464 in words is "one hundred twenty-nine trillion, seven hundred twenty-four billion, seven hundred fifty-five million, three hundred fifty-six thousand, four hundred sixty-four".