11215542663 has 16 divisors (see below), whose sum is σ = 17893743840. Its totient is φ = 6901872192.

The previous prime is 11215542659. The next prime is 11215542673. The reversal of 11215542663 is 36624551211.

11215542663 is a `hidden beast` number, since 1 + 1 + 21 + 554 + 26 + 63 = 666.

It is not a de Polignac number, because 11215542663 - 2² = 11215542659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215542643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15976206 + ... + 15976907.

It is an arithmetic number, because the mean of its divisors is an integer number (1118358990).

Almost surely, 2^11215542663 is an apocalyptic number.

11215542663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11215542663 is a deficient number, since it is larger than the sum of its proper divisors (6678201177).

11215542663 is a wasteful number, since it uses less digits than its factorization.

11215542663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31953135 (or 31953129 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

It can be divided in two parts, 11215 and 542663, that added together give a triangular number (553878 = T₁₀₅₂).

The spelling of 11215542663 in words is "eleven billion, two hundred fifteen million, five hundred forty-two thousand, six hundred sixty-three".