11721023663 has 2 divisors, whose sum is σ = 11721023664. Its totient is φ = 11721023662.

The previous prime is 11721023659. The next prime is 11721023681. The reversal of 11721023663 is 36632012711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11721023663 - 2² = 11721023659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11721623663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860511831 + 5860511832.

It is an arithmetic number, because the mean of its divisors is an integer number (5860511832).

Almost surely, 2^11721023663 is an apocalyptic number.

11721023663 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721023663 is an equidigital number, since it uses as much as digits as its factorization.

11721023663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 11721023663 in words is "eleven billion, seven hundred twenty-one million, twenty-three thousand, six hundred sixty-three".