13523400405 has 24 divisors (see below), whose sum is σ = 23722983648. Its totient is φ = 7125580896.

The previous prime is 13523400389. The next prime is 13523400409. The reversal of 13523400405 is 50400432531.

It is not a de Polignac number, because 13523400405 - 2⁴ = 13523400389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13523400409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1806627 + ... + 1814096.

It is an arithmetic number, because the mean of its divisors is an integer number (988457652).

Almost surely, 2^13523400405 is an apocalyptic number.

13523400405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13523400405 is a deficient number, since it is larger than the sum of its proper divisors (10199583243).

13523400405 is a wasteful number, since it uses less digits than its factorization.

13523400405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620817 (or 3620814 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 13523400405 its reverse (50400432531), we get a palindrome (63923832936).

The spelling of 13523400405 in words is "thirteen billion, five hundred twenty-three million, four hundred thousand, four hundred five".