11615065605661 has 8 divisors (see below), whose sum is σ = 13405790006784. Its totient is φ = 9857198533200.

The previous prime is 11615065605629. The next prime is 11615065605833. The reversal of 11615065605661 is 16650656051611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11615065605661 - 2⁵ = 11615065605629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11615065600661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8214331405 + ... + 8214332818.

It is an arithmetic number, because the mean of its divisors is an integer number (1675723750848).

Almost surely, 2^{11615065605661} is an apocalyptic number.

It is an amenable number.

11615065605661 is a deficient number, since it is larger than the sum of its proper divisors (1790724401123).

11615065605661 is a wasteful number, since it uses less digits than its factorization.

11615065605661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16428664331.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 11615065605661 in words is "eleven trillion, six hundred fifteen billion, sixty-five million, six hundred five thousand, six hundred sixty-one".