129454744456 has 64 divisors (see below), whose sum is σ = 258332405760. Its totient is φ = 60605952000.

The previous prime is 129454744409. The next prime is 129454744481. The reversal of 129454744456 is 654447454921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129454744397 and 129454744406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61322841 + ... + 61324951.

It is an arithmetic number, because the mean of its divisors is an integer number (4036443840).

Almost surely, 2^129454744456 is an apocalyptic number.

It is an amenable number.

129454744456 is a deficient number, since it is larger than the sum of its proper divisors (128877661304).

129454744456 is a wasteful number, since it uses less digits than its factorization.

129454744456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4242 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 55.

The spelling of 129454744456 in words is "one hundred twenty-nine billion, four hundred fifty-four million, seven hundred forty-four thousand, four hundred fifty-six".