11621783009 has 2 divisors, whose sum is σ = 11621783010. Its totient is φ = 11621783008.

The previous prime is 11621783003. The next prime is 11621783051. The reversal of 11621783009 is 90038712611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10953715600 + 668067409 = 104660^2 + 25847^2 .

It is a cyclic number.

It is not a de Polignac number, because 11621783009 - 2²⁸ = 11353347553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11621783003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810891504 + 5810891505.

It is an arithmetic number, because the mean of its divisors is an integer number (5810891505).

Almost surely, 2^11621783009 is an apocalyptic number.

It is an amenable number.

11621783009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621783009 is an equidigital number, since it uses as much as digits as its factorization.

11621783009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 11621783009 in words is "eleven billion, six hundred twenty-one million, seven hundred eighty-three thousand, nine".