13210643144 has 8 divisors (see below), whose sum is σ = 24769955910. Its totient is φ = 6605321568.

The previous prime is 13210643141. The next prime is 13210643167. The reversal of 13210643144 is 44134601231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13149208900 + 61434244 = 114670^2 + 7838^2 .

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

It is a super-2 number, since 2×13210643144² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13210643141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825665189 + ... + 825665204.

Almost surely, 2^13210643144 is an apocalyptic number.

It is an amenable number.

13210643144 is a deficient number, since it is larger than the sum of its proper divisors (11559312766).

13210643144 is a wasteful number, since it uses less digits than its factorization.

13210643144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651330399 (or 1651330395 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 13210643144 in words is "thirteen billion, two hundred ten million, six hundred forty-three thousand, one hundred forty-four".