13963881491 has 8 divisors (see below), whose sum is σ = 15970998624. Its totient is φ = 11959833600.

The previous prime is 13963881487. The next prime is 13963881499. The reversal of 13963881491 is 19418836931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13963881491 - 2² = 13963881487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13963881499) 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, 757550 + ... + 775763.

It is an arithmetic number, because the mean of its divisors is an integer number (1996374828).

Almost surely, 2^13963881491 is an apocalyptic number.

13963881491 is a deficient number, since it is larger than the sum of its proper divisors (2007117133).

13963881491 is a wasteful number, since it uses less digits than its factorization.

13963881491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534621.

The product of its digits is 1119744, while the sum is 53.

The spelling of 13963881491 in words is "thirteen billion, nine hundred sixty-three million, eight hundred eighty-one thousand, four hundred ninety-one".