129481042656 has 48 divisors (see below), whose sum is σ = 388443129984. Its totient is φ = 36994583424.

The previous prime is 129481042633. The next prime is 129481042667. The reversal of 129481042656 is 656240184921.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 96339390 + ... + 96340733.

It is an arithmetic number, because the mean of its divisors is an integer number (8092565208).

Almost surely, 2^129481042656 is an apocalyptic number.

129481042656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129481042656 is an abundant number, since it is smaller than the sum of its proper divisors (258962087328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129481042656 is a wasteful number, since it uses less digits than its factorization.

129481042656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192680143 (or 192680135 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 129481042656 in words is "one hundred twenty-nine billion, four hundred eighty-one million, forty-two thousand, six hundred fifty-six".