129551038842 has 32 divisors (see below), whose sum is σ = 263572398144. Its totient is φ = 42439824000.

The previous prime is 129551038801. The next prime is 129551038871. The reversal of 129551038842 is 248830155921.

It is a junction number, because it is equal to n+sod(n) for n = 129551038791 and 129551038800.

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, 285342 + ... + 583542.

It is an arithmetic number, because the mean of its divisors is an integer number (8236637442).

Almost surely, 2^129551038842 is an apocalyptic number.

129551038842 is an abundant number, since it is smaller than the sum of its proper divisors (134021359302).

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

129551038842 is a wasteful number, since it uses less digits than its factorization.

129551038842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299454.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 129551038842 in words is "one hundred twenty-nine billion, five hundred fifty-one million, thirty-eight thousand, eight hundred forty-two".