31129543958439 has 16 divisors (see below), whose sum is σ = 44322376273920. Its totient is φ = 19391039616480.

The previous prime is 31129543958431. The next prime is 31129543958473. The reversal of 31129543958439 is 93485934592113.

It is not a de Polignac number, because 31129543958439 - 2³ = 31129543958431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31129543958439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31129543958431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5771140047 + ... + 5771145440.

It is an arithmetic number, because the mean of its divisors is an integer number (2770148517120).

Almost surely, 2^{31129543958439} is an apocalyptic number.

31129543958439 is a deficient number, since it is larger than the sum of its proper divisors (13192832315481).

31129543958439 is a wasteful number, since it uses less digits than its factorization.

31129543958439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11542285550.

The product of its digits is 125971200, while the sum is 66.

The spelling of 31129543958439 in words is "thirty-one trillion, one hundred twenty-nine billion, five hundred forty-three million, nine hundred fifty-eight thousand, four hundred thirty-nine".