11516156553621 has 8 divisors (see below), whose sum is σ = 15357249039520. Its totient is φ = 7676250885072.

The previous prime is 11516156553617. The next prime is 11516156553677. The reversal of 11516156553621 is 12635565161511.

It is a happy number.

11516156553621 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 not a de Polignac number, because 11516156553621 - 2² = 11516156553617 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 (11516156553221) 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, 296681695 + ... + 296720508.

It is an arithmetic number, because the mean of its divisors is an integer number (1919656129940).

Almost surely, 2^{11516156553621} is an apocalyptic number.

It is an amenable number.

11516156553621 is a deficient number, since it is larger than the sum of its proper divisors (3841092485899).

11516156553621 is an equidigital number, since it uses as much as digits as its factorization.

11516156553621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593408675.

The product of its digits is 810000, while the sum is 48.

The spelling of 11516156553621 in words is "eleven trillion, five hundred sixteen billion, one hundred fifty-six million, five hundred fifty-three thousand, six hundred twenty-one".