13505420156 has 12 divisors (see below), whose sum is σ = 23638132392. Its totient is φ = 6751668048.

The previous prime is 13505420141. The next prime is 13505420183. The reversal of 13505420156 is 65102450531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230975 + ... + 283478.

It is an arithmetic number, because the mean of its divisors is an integer number (1969844366).

Almost surely, 2^13505420156 is an apocalyptic number.

It is an amenable number.

13505420156 is a deficient number, since it is larger than the sum of its proper divisors (10132712236).

13505420156 is a wasteful number, since it uses less digits than its factorization.

13505420156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521020 (or 521018 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 13505420156 its reverse (65102450531), we get a palindrome (78607870687).

The spelling of 13505420156 in words is "thirteen billion, five hundred five million, four hundred twenty thousand, one hundred fifty-six".