129027513616 has 45 divisors (see below), whose sum is σ = 253082078031. Its totient is φ = 63725663232.

The previous prime is 129027513581. The next prime is 129027513647. The reversal of 129027513616 is 616315720921.

The square root of 129027513616 is 359204.

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

It can be written as a sum of positive squares in 4 ways, for example, as 32977107216 + 96050406400 = 181596^2 + 309920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 127876120 + ... + 127877128.

Almost surely, 2^129027513616 is an apocalyptic number.

129027513616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

129027513616 is the 359204-th square number.

It is an amenable number.

129027513616 is a deficient number, since it is larger than the sum of its proper divisors (124054564415).

129027513616 is an frugal number, since it uses more digits than its factorization.

129027513616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 129027513616 in words is "one hundred twenty-nine billion, twenty-seven million, five hundred thirteen thousand, six hundred sixteen".