11261522661 has 16 divisors (see below), whose sum is σ = 15911736000. Its totient is φ = 7064800128.

The previous prime is 11261522651. The next prime is 11261522663. The reversal of 11261522661 is 16622516211.

It is not a de Polignac number, because 11261522661 - 2⁹ = 11261522149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261522663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654496 + ... + 671481.

It is an arithmetic number, because the mean of its divisors is an integer number (994483500).

Almost surely, 2^11261522661 is an apocalyptic number.

It is an amenable number.

11261522661 is a deficient number, since it is larger than the sum of its proper divisors (4650213339).

11261522661 is a wasteful number, since it uses less digits than its factorization.

11261522661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326148.

The product of its digits is 8640, while the sum is 33.

The spelling of 11261522661 in words is "eleven billion, two hundred sixty-one million, five hundred twenty-two thousand, six hundred sixty-one".