13959547665 has 128 divisors (see below), whose sum is σ = 28400025600. Its totient is φ = 5708102400.

The previous prime is 13959547663. The next prime is 13959547673. The reversal of 13959547665 is 56674595931.

It is not a de Polignac number, because 13959547665 - 2¹ = 13959547663 is a prime.

It is a super-2 number, since 2×13959547665² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13959547599 and 13959547608.

It is not an unprimeable number, because it can be changed into a prime (13959547663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3622990 + ... + 3626840.

It is an arithmetic number, because the mean of its divisors is an integer number (221875200).

Almost surely, 2^13959547665 is an apocalyptic number.

13959547665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13959547665 is an abundant number, since it is smaller than the sum of its proper divisors (14440477935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13959547665 is a wasteful number, since it uses less digits than its factorization.

13959547665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987.

The product of its digits is 30618000, while the sum is 60.

The spelling of 13959547665 in words is "thirteen billion, nine hundred fifty-nine million, five hundred forty-seven thousand, six hundred sixty-five".