13578913447 has 4 divisors (see below), whose sum is σ = 14813360136. Its totient is φ = 12344466760.

The previous prime is 13578913409. The next prime is 13578913459. The reversal of 13578913447 is 74431987531.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13578913447 is a prime.

It is a super-2 number, since 2×13578913447² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13578913394 and 13578913403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13578913487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617223328 + ... + 617223349.

It is an arithmetic number, because the mean of its divisors is an integer number (3703340034).

Almost surely, 2^13578913447 is an apocalyptic number.

13578913447 is a deficient number, since it is larger than the sum of its proper divisors (1234446689).

13578913447 is a wasteful number, since it uses less digits than its factorization.

13578913447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234446688.

The product of its digits is 2540160, while the sum is 52.

The spelling of 13578913447 in words is "thirteen billion, five hundred seventy-eight million, nine hundred thirteen thousand, four hundred forty-seven".