13440646552 has 8 divisors (see below), whose sum is σ = 25201212300. Its totient is φ = 6720323272.

The previous prime is 13440646547. The next prime is 13440646553. The reversal of 13440646552 is 25564604431.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440646553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840040402 + ... + 840040417.

Almost surely, 2^13440646552 is an apocalyptic number.

It is an amenable number.

13440646552 is a deficient number, since it is larger than the sum of its proper divisors (11760565748).

13440646552 is a wasteful number, since it uses less digits than its factorization.

13440646552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680080825 (or 1680080821 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 13440646552 in words is "thirteen billion, four hundred forty million, six hundred forty-six thousand, five hundred fifty-two".