11016561541 has 4 divisors (see below), whose sum is σ = 11016772300. Its totient is φ = 11016350784.

The previous prime is 11016561539. The next prime is 11016561581. The reversal of 11016561541 is 14516561011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14516561011 = 239 ⋅60738749.

It can be written as a sum of positive squares in 2 ways, for example, as 1506216100 + 9510345441 = 38810^2 + 97521^2 .

It is a cyclic number.

It is not a de Polignac number, because 11016561541 - 2¹ = 11016561539 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 (11016561581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38605 + ... + 153373.

It is an arithmetic number, because the mean of its divisors is an integer number (2754193075).

Almost surely, 2^11016561541 is an apocalyptic number.

It is an amenable number.

11016561541 is a deficient number, since it is larger than the sum of its proper divisors (210759).

11016561541 is an equidigital number, since it uses as much as digits as its factorization.

11016561541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210758.

The product of its (nonzero) digits is 3600, while the sum is 31.

The spelling of 11016561541 in words is "eleven billion, sixteen million, five hundred sixty-one thousand, five hundred forty-one".