13640365129 has 8 divisors (see below), whose sum is σ = 14016622088. Its totient is φ = 13264508160.

The previous prime is 13640365121. The next prime is 13640365169. The reversal of 13640365129 is 92156304631.

It can be written as a sum of positive squares in 4 ways, for example, as 3934174729 + 9706190400 = 62723^2 + 98520^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13640365129 - 2³ = 13640365121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13640365091 and 13640365100.

It is not an unprimeable number, because it can be changed into a prime (13640365121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30192 + ... + 167905.

It is an arithmetic number, because the mean of its divisors is an integer number (1752077761).

Almost surely, 2^13640365129 is an apocalyptic number.

It is an amenable number.

13640365129 is a deficient number, since it is larger than the sum of its proper divisors (376256959).

13640365129 is a wasteful number, since it uses less digits than its factorization.

13640365129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199995.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 13640365129 in words is "thirteen billion, six hundred forty million, three hundred sixty-five thousand, one hundred twenty-nine".