13145421663 has 64 divisors (see below), whose sum is σ = 21850560000. Its totient is φ = 7742972160.

The previous prime is 13145421623. The next prime is 13145421721. The reversal of 13145421663 is 36612454131.

13145421663 is a `hidden beast` number, since 131 + 45 + 421 + 6 + 63 = 666.

It is not a de Polignac number, because 13145421663 - 2⁹ = 13145421151 is a prime.

It is a super-2 number, since 2×13145421663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145421623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1555333 + ... + 1563761.

It is an arithmetic number, because the mean of its divisors is an integer number (341415000).

Almost surely, 2^13145421663 is an apocalyptic number.

13145421663 is a deficient number, since it is larger than the sum of its proper divisors (8705138337).

13145421663 is a wasteful number, since it uses less digits than its factorization.

13145421663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597 (or 8591 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 13145421663 its reverse (36612454131), we get a palindrome (49757875794).

The spelling of 13145421663 in words is "thirteen billion, one hundred forty-five million, four hundred twenty-one thousand, six hundred sixty-three".