82439626459129 has 3 divisors (see below), whose sum is σ = 82439635538757. Its totient is φ = 82439617379502.

The previous prime is 82439626459123. The next prime is 82439626459139. The reversal of 82439626459129 is 92195462693428.

The square root of 82439626459129 is 9079627.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 82439626459129 - 2³³ = 82431036524537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82439626459123) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4539814 + ... + 13619440.

It is an arithmetic number, because the mean of its divisors is an integer number (27479878512919).

Almost surely, 2^{82439626459129} is an apocalyptic number.

82439626459129 is the 9079627-th square number.

82439626459129 is the 4539814-th centered octagonal number.

It is an amenable number.

82439626459129 is a deficient number, since it is larger than the sum of its proper divisors (9079628).

82439626459129 is an frugal number, since it uses more digits than its factorization.

82439626459129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18159254 (or 9079627 counting only the distinct ones).

The product of its digits is 403107840, while the sum is 70.

The spelling of 82439626459129 in words is "eighty-two trillion, four hundred thirty-nine billion, six hundred twenty-six million, four hundred fifty-nine thousand, one hundred twenty-nine".