11615011261 has 8 divisors (see below), whose sum is σ = 13442328320. Its totient is φ = 9829701648.

The previous prime is 11615011231. The next prime is 11615011267. The reversal of 11615011261 is 16211051611.

11615011261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11615011261 - 2²⁵ = 11581456829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11615011267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10501266 + ... + 10502371.

It is an arithmetic number, because the mean of its divisors is an integer number (1680291040).

Almost surely, 2^11615011261 is an apocalyptic number.

It is an amenable number.

11615011261 is a deficient number, since it is larger than the sum of its proper divisors (1827317059).

11615011261 is an equidigital number, since it uses as much as digits as its factorization.

11615011261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21003723.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 11615011261 its reverse (16211051611), we get a palindrome (27826062872).

The spelling of 11615011261 in words is "eleven billion, six hundred fifteen million, eleven thousand, two hundred sixty-one".