11615413623409 has 2 divisors, whose sum is σ = 11615413623410. Its totient is φ = 11615413623408.

The previous prime is 11615413623371. The next prime is 11615413623491. The reversal of 11615413623409 is 90432631451611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10701056935009 + 914356688400 = 3271247^2 + 956220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11615413623409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11615443623409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5807706811704 + 5807706811705.

It is an arithmetic number, because the mean of its divisors is an integer number (5807706811705).

Almost surely, 2^{11615413623409} is an apocalyptic number.

It is an amenable number.

11615413623409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11615413623409 is an equidigital number, since it uses as much as digits as its factorization.

11615413623409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 11615413623409 in words is "eleven trillion, six hundred fifteen billion, four hundred thirteen million, six hundred twenty-three thousand, four hundred nine".