11657562221 has 8 divisors (see below), whose sum is σ = 11712877344. Its totient is φ = 11602318000.

The previous prime is 11657562211. The next prime is 11657562223. The reversal of 11657562221 is 12226575611.

11657562221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11657562221 - 2¹⁸ = 11657300077 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 (11657562223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327710 + ... + 361536.

It is an arithmetic number, because the mean of its divisors is an integer number (1464109668).

Almost surely, 2^11657562221 is an apocalyptic number.

It is an amenable number.

11657562221 is a deficient number, since it is larger than the sum of its proper divisors (55315123).

11657562221 is a wasteful number, since it uses less digits than its factorization.

11657562221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35451.

The product of its digits is 50400, while the sum is 38.

The spelling of 11657562221 in words is "eleven billion, six hundred fifty-seven million, five hundred sixty-two thousand, two hundred twenty-one".