129039956283611 has 4 divisors (see below), whose sum is σ = 129215999880912. Its totient is φ = 128863912686312.

The previous prime is 129039956283607. The next prime is 129039956283643. The reversal of 129039956283611 is 116382659930921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129039956283611 - 2² = 129039956283607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129039956283661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88021797551 + ... + 88021799016.

It is an arithmetic number, because the mean of its divisors is an integer number (32303999970228).

Almost surely, 2^{129039956283611} is an apocalyptic number.

129039956283611 is a deficient number, since it is larger than the sum of its proper divisors (176043597301).

129039956283611 is an equidigital number, since it uses as much as digits as its factorization.

129039956283611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176043597300.

The product of its (nonzero) digits is 37791360, while the sum is 65.

The spelling of 129039956283611 in words is "one hundred twenty-nine trillion, thirty-nine billion, nine hundred fifty-six million, two hundred eighty-three thousand, six hundred eleven".