13645317506 has 8 divisors (see below), whose sum is σ = 20484367500. Its totient is φ = 6817195008.

The previous prime is 13645317467. The next prime is 13645317527. The reversal of 13645317506 is 60571354631.

It can be written as a sum of positive squares in 2 ways, for example, as 13575745225 + 69572281 = 116515^2 + 8341^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2728751 + ... + 2733746.

Almost surely, 2^13645317506 is an apocalyptic number.

13645317506 is a deficient number, since it is larger than the sum of its proper divisors (6839049994).

13645317506 is a wasteful number, since it uses less digits than its factorization.

13645317506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463748.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 13645317506 in words is "thirteen billion, six hundred forty-five million, three hundred seventeen thousand, five hundred six".