129584277649 has 6 divisors (see below), whose sum is σ = 130854602706. Its totient is φ = 128326167360.

The previous prime is 129584277611. The next prime is 129584277671. The reversal of 129584277649 is 946772485921.

It can be written as a sum of positive squares in only one way, i.e., 97464469249 + 32119808400 = 312193^2 + 179220^2 .

It is not a de Polignac number, because 129584277649 - 2⁷ = 129584277521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129584277689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6096672 + ... + 6117889.

It is an arithmetic number, because the mean of its divisors is an integer number (21809100451).

Almost surely, 2^129584277649 is an apocalyptic number.

It is an amenable number.

129584277649 is a deficient number, since it is larger than the sum of its proper divisors (1270325057).

129584277649 is an equidigital number, since it uses as much as digits as its factorization.

129584277649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12214767 (or 12214664 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 64.

The spelling of 129584277649 in words is "one hundred twenty-nine billion, five hundred eighty-four million, two hundred seventy-seven thousand, six hundred forty-nine".