13123335564 has 36 divisors (see below), whose sum is σ = 33266882376. Its totient is φ = 4362048768.

The previous prime is 13123335559. The next prime is 13123335581. The reversal of 13123335564 is 46553332131.

13123335564 is a `hidden beast` number, since 1 + 31 + 2 + 33 + 35 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503634 + ... + 529049.

It is an arithmetic number, because the mean of its divisors is an integer number (924080066).

Almost surely, 2^13123335564 is an apocalyptic number.

It is an amenable number.

13123335564 is an abundant number, since it is smaller than the sum of its proper divisors (20143546812).

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

13123335564 is a wasteful number, since it uses less digits than its factorization.

13123335564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033046 (or 1033041 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

Adding to 13123335564 its reverse (46553332131), we get a palindrome (59676667695).

The spelling of 13123335564 in words is "thirteen billion, one hundred twenty-three million, three hundred thirty-five thousand, five hundred sixty-four".