11052578261 has 4 divisors (see below), whose sum is σ = 11052791724. Its totient is φ = 11052364800.

The previous prime is 11052578249. The next prime is 11052578267. The reversal of 11052578261 is 16287525011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16287525011 = 89 ⋅183005899.

It can be written as a sum of positive squares in 2 ways, for example, as 8533140625 + 2519437636 = 92375^2 + 50194^2 .

It is a cyclic number.

It is not a de Polignac number, because 11052578261 - 2¹⁸ = 11052316117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11052578267) 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, 25751 + ... + 150891.

It is an arithmetic number, because the mean of its divisors is an integer number (2763197931).

Almost surely, 2^11052578261 is an apocalyptic number.

It is an amenable number.

11052578261 is a deficient number, since it is larger than the sum of its proper divisors (213463).

11052578261 is an equidigital number, since it uses as much as digits as its factorization.

11052578261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213462.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 11052578261 in words is "eleven billion, fifty-two million, five hundred seventy-eight thousand, two hundred sixty-one".