13608961329 has 32 divisors (see below), whose sum is σ = 19361994624. Its totient is φ = 8472821760.

The previous prime is 13608961313. The next prime is 13608961357. The reversal of 13608961329 is 92316980631.

It is not a de Polignac number, because 13608961329 - 2⁴ = 13608961313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13608961309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4358889 + ... + 4362009.

It is an arithmetic number, because the mean of its divisors is an integer number (605062332).

Almost surely, 2^13608961329 is an apocalyptic number.

It is an amenable number.

13608961329 is a deficient number, since it is larger than the sum of its proper divisors (5753033295).

13608961329 is a wasteful number, since it uses less digits than its factorization.

13608961329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777.

The product of its (nonzero) digits is 419904, while the sum is 48.

It can be divided in two parts, 1360896 and 1329, that multiplied together give a square (1808630784 = 42528²).

The spelling of 13608961329 in words is "thirteen billion, six hundred eight million, nine hundred sixty-one thousand, three hundred twenty-nine".