11505543201 has 12 divisors (see below), whose sum is σ = 17192191380. Its totient is φ = 7405866720.

The previous prime is 11505543193. The next prime is 11505543221. The reversal of 11505543201 is 10234550511.

11505543201 is a `hidden beast` number, since 115 + 0 + 5 + 543 + 2 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5505491601 + 6000051600 = 74199^2 + 77460^2 .

It is not a de Polignac number, because 11505543201 - 2³ = 11505543193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11505543221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22041010 + ... + 22041531.

It is an arithmetic number, because the mean of its divisors is an integer number (1432682615).

Almost surely, 2^11505543201 is an apocalyptic number.

It is an amenable number.

11505543201 is a deficient number, since it is larger than the sum of its proper divisors (5686648179).

11505543201 is a wasteful number, since it uses less digits than its factorization.

11505543201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44082576 (or 44082573 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 11505543201 in words is "eleven billion, five hundred five million, five hundred forty-three thousand, two hundred one".