13565312320 has 112 divisors (see below), whose sum is σ = 38108095488. Its totient is φ = 4500910080.

The previous prime is 13565312311. The next prime is 13565312329. The reversal of 13565312320 is 2321356531.

It is an interprime number because it is at equal distance from previous prime (13565312311) and next prime (13565312329).

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13565312329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28237 + ... + 167116.

Almost surely, 2^13565312320 is an apocalyptic number.

13565312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13565312320 is an abundant number, since it is smaller than the sum of its proper divisors (24542783168).

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

13565312320 is a wasteful number, since it uses less digits than its factorization.

13565312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195408 (or 195398 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 13565312320 its reverse (2321356531), we get a palindrome (15886668851).

The spelling of 13565312320 in words is "thirteen billion, five hundred sixty-five million, three hundred twelve thousand, three hundred twenty".