13555612356 has 144 divisors (see below), whose sum is σ = 37459719360. Its totient is φ = 3782039040.

The previous prime is 13555612313. The next prime is 13555612379. The reversal of 13555612356 is 65321655531.

It is a super-2 number, since 2×13555612356² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16351350 + ... + 16352178.

It is an arithmetic number, because the mean of its divisors is an integer number (260136940).

Almost surely, 2^13555612356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13555612356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18729859680).

13555612356 is an abundant number, since it is smaller than the sum of its proper divisors (23904107004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13555612356 is a wasteful number, since it uses less digits than its factorization.

13555612356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1591 counting only the distinct ones).

The product of its digits is 405000, while the sum is 42.

The spelling of 13555612356 in words is "thirteen billion, five hundred fifty-five million, six hundred twelve thousand, three hundred fifty-six".