13144261646 has 16 divisors (see below), whose sum is σ = 19854567504. Its totient is φ = 6526142784.

The previous prime is 13144261583. The next prime is 13144261649. The reversal of 13144261646 is 64616244131.

It is a super-2 number, since 2×13144261646² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13144261649) 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, 372020 + ... + 405816.

It is an arithmetic number, because the mean of its divisors is an integer number (1240910469).

Almost surely, 2^13144261646 is an apocalyptic number.

13144261646 is a deficient number, since it is larger than the sum of its proper divisors (6710305858).

13144261646 is a wasteful number, since it uses less digits than its factorization.

13144261646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35155.

The product of its digits is 82944, while the sum is 38.

The spelling of 13144261646 in words is "thirteen billion, one hundred forty-four million, two hundred sixty-one thousand, six hundred forty-six".