11721503659 has 2 divisors, whose sum is σ = 11721503660. Its totient is φ = 11721503658.

The previous prime is 11721503657. The next prime is 11721503669. The reversal of 11721503659 is 95630512711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11721503659 - 2¹ = 11721503657 is a prime.

Together with 11721503657, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11721503657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860751829 + 5860751830.

It is an arithmetic number, because the mean of its divisors is an integer number (5860751830).

Almost surely, 2^11721503659 is an apocalyptic number.

11721503659 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721503659 is an equidigital number, since it uses as much as digits as its factorization.

11721503659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 11721503659 in words is "eleven billion, seven hundred twenty-one million, five hundred three thousand, six hundred fifty-nine".