13578912469 has 16 divisors (see below), whose sum is σ = 14938527600. Its totient is φ = 12285471744.

The previous prime is 13578912463. The next prime is 13578912499. The reversal of 13578912469 is 96421987531.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 419840100 + 13159072369 = 20490^2 + 114713^2 .

It is a cyclic number.

It is not a de Polignac number, because 13578912469 - 2³ = 13578912461 is a prime.

It is a super-2 number, since 2×13578912469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13578912461) 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, 52759 + ... + 173035.

It is an arithmetic number, because the mean of its divisors is an integer number (933657975).

Almost surely, 2^13578912469 is an apocalyptic number.

It is an amenable number.

13578912469 is a deficient number, since it is larger than the sum of its proper divisors (1359615131).

13578912469 is a wasteful number, since it uses less digits than its factorization.

13578912469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120552.

The product of its digits is 3265920, while the sum is 55.

The spelling of 13578912469 in words is "thirteen billion, five hundred seventy-eight million, nine hundred twelve thousand, four hundred sixty-nine".