11172511663 has 4 divisors (see below), whose sum is σ = 11275011880. Its totient is φ = 11070011448.

The previous prime is 11172511657. The next prime is 11172511681. The reversal of 11172511663 is 36611527111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36611527111 = 773 ⋅47362907.

It is a cyclic number.

It is not a de Polignac number, because 11172511663 - 2⁹ = 11172511151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172511633) 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, 51249945 + ... + 51250162.

It is an arithmetic number, because the mean of its divisors is an integer number (2818752970).

Almost surely, 2^11172511663 is an apocalyptic number.

11172511663 is a deficient number, since it is larger than the sum of its proper divisors (102500217).

11172511663 is a wasteful number, since it uses less digits than its factorization.

11172511663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102500216.

The product of its digits is 7560, while the sum is 34.

The spelling of 11172511663 in words is "eleven billion, one hundred seventy-two million, five hundred eleven thousand, six hundred sixty-three".