11381163563 has 12 divisors (see below), whose sum is σ = 14296999920. Its totient is φ = 8868438480.

The previous prime is 11381163559. The next prime is 11381163581. The reversal of 11381163563 is 36536118311.

It is a happy number.

It is not a de Polignac number, because 11381163563 - 2² = 11381163559 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11381163763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6717668 + ... + 6719361.

It is an arithmetic number, because the mean of its divisors is an integer number (1191416660).

Almost surely, 2^11381163563 is an apocalyptic number.

11381163563 is a deficient number, since it is larger than the sum of its proper divisors (2915836357).

11381163563 is a wasteful number, since it uses less digits than its factorization.

11381163563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13437058 (or 13437047 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The spelling of 11381163563 in words is "eleven billion, three hundred eighty-one million, one hundred sixty-three thousand, five hundred sixty-three".