12535908520 has 32 divisors (see below), whose sum is σ = 28209332520. Its totient is φ = 5013734400.

The previous prime is 12535908499. The next prime is 12535908529. The reversal of 12535908520 is 2580953521.

It can be written as a sum of positive squares in 4 ways, for example, as 6852859524 + 5683048996 = 82782^2 + 75386^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (12535908529) 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, 430420 + ... + 458620.

Almost surely, 2^12535908520 is an apocalyptic number.

12535908520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12535908520 is an abundant number, since it is smaller than the sum of its proper divisors (15673424000).

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

12535908520 is a wasteful number, since it uses less digits than its factorization.

12535908520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39325 (or 39321 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 12535908520 in words is "twelve billion, five hundred thirty-five million, nine hundred eight thousand, five hundred twenty".