13664565574 has 12 divisors (see below), whose sum is σ = 22529594052. Its totient is φ = 6211166060.

The previous prime is 13664565511. The next prime is 13664565589. The reversal of 13664565574 is 47556546631.

It is a super-2 number, since 2×13664565574² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28232332 + ... + 28232815.

It is an arithmetic number, because the mean of its divisors is an integer number (1877466171).

Almost surely, 2^13664565574 is an apocalyptic number.

13664565574 is a deficient number, since it is larger than the sum of its proper divisors (8865028478).

13664565574 is a wasteful number, since it uses less digits than its factorization.

13664565574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56465171 (or 56465160 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 52.

The spelling of 13664565574 in words is "thirteen billion, six hundred sixty-four million, five hundred sixty-five thousand, five hundred seventy-four".