129056840739 has 24 divisors (see below), whose sum is σ = 197918959680. Its totient is φ = 80756160768.

The previous prime is 129056840729. The next prime is 129056840741. The reversal of 129056840739 is 937048650921.

129056840739 is a `hidden beast` number, since 1 + 2 + 9 + 0 + 568 + 4 + 0 + 73 + 9 = 666.

It is not a de Polignac number, because 129056840739 - 2¹⁷ = 129056709667 is a prime.

It is a super-3 number, since 3×129056840739³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (129056840729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1093044 + ... + 1205345.

It is an arithmetic number, because the mean of its divisors is an integer number (8246623320).

It is a 1-persistent number, because it is pandigital, but 2⋅129056840739 = 258113681478 is not.

Almost surely, 2^129056840739 is an apocalyptic number.

129056840739 is a deficient number, since it is larger than the sum of its proper divisors (68862118941).

129056840739 is a wasteful number, since it uses less digits than its factorization.

129056840739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298779 (or 2298776 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 129056840739 in words is "one hundred twenty-nine billion, fifty-six million, eight hundred forty thousand, seven hundred thirty-nine".