11555226620541 has 24 divisors (see below), whose sum is σ = 17675827111800. Its totient is φ = 7249055164416.

The previous prime is 11555226620537. The next prime is 11555226620551. The reversal of 11555226620541 is 14502662255511.

It is a happy number.

11555226620541 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 5 + 22 + 66 + 20 + 541 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8943030440100 + 2612196180441 = 2990490^2 + 1616229^2 .

It is not a de Polignac number, because 11555226620541 - 2² = 11555226620537 is a prime.

It is a super-3 number, since 3×11555226620541³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555226620501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5815116 + ... + 7544933.

It is an arithmetic number, because the mean of its divisors is an integer number (736492796325).

Almost surely, 2^{11555226620541} is an apocalyptic number.

It is an amenable number.

11555226620541 is a deficient number, since it is larger than the sum of its proper divisors (6120600491259).

11555226620541 is a wasteful number, since it uses less digits than its factorization.

11555226620541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13365725 (or 13365722 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 11555226620541 in words is "eleven trillion, five hundred fifty-five billion, two hundred twenty-six million, six hundred twenty thousand, five hundred forty-one".