13963617481 has 4 divisors (see below), whose sum is σ = 15233037264. Its totient is φ = 12694197700.

The previous prime is 13963617461. The next prime is 13963617491. The reversal of 13963617481 is 18471636931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13963617481 - 2⁹ = 13963616969 is a prime.

It is a super-2 number, since 2×13963617481² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13963617431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634709875 + ... + 634709896.

It is an arithmetic number, because the mean of its divisors is an integer number (3808259316).

Almost surely, 2^13963617481 is an apocalyptic number.

13963617481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13963617481 is a deficient number, since it is larger than the sum of its proper divisors (1269419783).

13963617481 is a wasteful number, since it uses less digits than its factorization.

13963617481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269419782.

The product of its digits is 653184, while the sum is 49.

The spelling of 13963617481 in words is "thirteen billion, nine hundred sixty-three million, six hundred seventeen thousand, four hundred eighty-one".