11552022661 has 4 divisors (see below), whose sum is σ = 11950368300. Its totient is φ = 11153677024.

The previous prime is 11552022653. The next prime is 11552022679. The reversal of 11552022661 is 16622025511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7352205025 + 4199817636 = 85745^2 + 64806^2 .

It is a cyclic number.

It is not a de Polignac number, because 11552022661 - 2³ = 11552022653 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 (11552020661) 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, 199172776 + ... + 199172833.

It is an arithmetic number, because the mean of its divisors is an integer number (2987592075).

Almost surely, 2^11552022661 is an apocalyptic number.

It is an amenable number.

11552022661 is a deficient number, since it is larger than the sum of its proper divisors (398345639).

11552022661 is an equidigital number, since it uses as much as digits as its factorization.

11552022661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398345638.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 11552022661 in words is "eleven billion, five hundred fifty-two million, twenty-two thousand, six hundred sixty-one".