129431574755 has 32 divisors (see below), whose sum is σ = 187194485760. Its totient is φ = 83926212480.

The previous prime is 129431574709. The next prime is 129431574761. The reversal of 129431574755 is 557475134921.

It is a happy number.

It is a Cunningham number, because it is equal to 359766²-1.

It is not a de Polignac number, because 129431574755 - 2⁶ = 129431574691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129431574697 and 129431574706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179882 + ... + 539648.

It is an arithmetic number, because the mean of its divisors is an integer number (5849827680).

Almost surely, 2^129431574755 is an apocalyptic number.

129431574755 is a deficient number, since it is larger than the sum of its proper divisors (57762911005).

129431574755 is a wasteful number, since it uses less digits than its factorization.

129431574755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360339.

The product of its digits is 5292000, while the sum is 53.

The spelling of 129431574755 in words is "one hundred twenty-nine billion, four hundred thirty-one million, five hundred seventy-four thousand, seven hundred fifty-five".