129791587681 has 16 divisors (see below), whose sum is σ = 154045319040. Its totient is φ = 106995732480.

The previous prime is 129791587657. The next prime is 129791587691. The reversal of 129791587681 is 186785197921.

It is a de Polignac number, because none of the positive numbers 2^k-129791587681 is a prime.

It is a super-2 number, since 2×129791587681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129791587621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1191735 + ... + 1296076.

It is an arithmetic number, because the mean of its divisors is an integer number (9627832440).

Almost surely, 2^129791587681 is an apocalyptic number.

It is an amenable number.

129791587681 is a deficient number, since it is larger than the sum of its proper divisors (24253731359).

129791587681 is a wasteful number, since it uses less digits than its factorization.

129791587681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488104.

The product of its digits is 15240960, while the sum is 64.

The spelling of 129791587681 in words is "one hundred twenty-nine billion, seven hundred ninety-one million, five hundred eighty-seven thousand, six hundred eighty-one".