13906657315585 has 4 divisors (see below), whose sum is σ = 16687988778708. Its totient is φ = 11125325852464.

The previous prime is 13906657315571. The next prime is 13906657315601. The reversal of 13906657315585 is 58551375660931.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7950865993984 + 5955791321601 = 2819728^2 + 2440449^2 .

It is a cyclic number.

It is not a de Polignac number, because 13906657315585 - 2⁵ = 13906657315553 is a prime.

It is a super-2 number, since 2×13906657315585² (a number of 27 digits) contains 22 as substring.

It is a Duffinian 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, 1390665731554 + ... + 1390665731563.

It is an arithmetic number, because the mean of its divisors is an integer number (4171997194677).

Almost surely, 2^{13906657315585} is an apocalyptic number.

It is an amenable number.

13906657315585 is a deficient number, since it is larger than the sum of its proper divisors (2781331463123).

13906657315585 is an equidigital number, since it uses as much as digits as its factorization.

13906657315585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781331463122.

The product of its (nonzero) digits is 102060000, while the sum is 64.

The spelling of 13906657315585 in words is "thirteen trillion, nine hundred six billion, six hundred fifty-seven million, three hundred fifteen thousand, five hundred eighty-five".