13535535520 has 48 divisors (see below), whose sum is σ = 34437531240. Its totient is φ = 4997735424.

The previous prime is 13535535509. The next prime is 13535535523. The reversal of 13535535520 is 2553553531.

It can be written as a sum of positive squares in 4 ways, for example, as 3550729744 + 9984805776 = 59588^2 + 99924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13535535520.

It is not an unprimeable number, because it can be changed into a prime (13535535523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3251655 + ... + 3255814.

Almost surely, 2^13535535520 is an apocalyptic number.

13535535520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13535535520 is an abundant number, since it is smaller than the sum of its proper divisors (20901995720).

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

13535535520 is a wasteful number, since it uses less digits than its factorization.

13535535520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507497 (or 6507489 counting only the distinct ones).

The product of its (nonzero) digits is 168750, while the sum is 37.

The spelling of 13535535520 in words is "thirteen billion, five hundred thirty-five million, five hundred thirty-five thousand, five hundred twenty".