129650711985 has 24 divisors (see below), whose sum is σ = 224804232744. Its totient is φ = 69123559680.

The previous prime is 129650711959. The next prime is 129650712019. The reversal of 129650711985 is 589117056921.

It is a happy number.

129650711985 is a `hidden beast` number, since 12 + 9 + 6 + 507 + 119 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 34712161344 + 94938550641 = 186312^2 + 308121^2 .

It is not a de Polignac number, because 129650711985 - 2⁹ = 129650711473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354946 + ... + 620715.

It is an arithmetic number, because the mean of its divisors is an integer number (9366843031).

Almost surely, 2^129650711985 is an apocalyptic number.

129650711985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129650711985 is a deficient number, since it is larger than the sum of its proper divisors (95153520759).

129650711985 is a wasteful number, since it uses less digits than its factorization.

129650711985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978625 (or 978622 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 54.

The spelling of 129650711985 in words is "one hundred twenty-nine billion, six hundred fifty million, seven hundred eleven thousand, nine hundred eighty-five".