129244128040 has 32 divisors (see below), whose sum is σ = 290809521000. Its totient is φ = 51695832064.

The previous prime is 129244128037. The next prime is 129244128053. The reversal of 129244128040 is 40821442921.

It can be written as a sum of positive squares in 4 ways, for example, as 111132889956 + 18111238084 = 333366^2 + 134578^2 .

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, 2211516 + ... + 2269204.

Almost surely, 2^129244128040 is an apocalyptic number.

129244128040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129244128040 is an abundant number, since it is smaller than the sum of its proper divisors (161565392960).

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

129244128040 is a wasteful number, since it uses less digits than its factorization.

129244128040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113709 (or 113705 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 129244128040 in words is "one hundred twenty-nine billion, two hundred forty-four million, one hundred twenty-eight thousand, forty".