11552532621 has 16 divisors (see below), whose sum is σ = 18369245184. Its totient is φ = 6314427504.

The previous prime is 11552532619. The next prime is 11552532637. The reversal of 11552532621 is 12623525511.

It is not a de Polignac number, because 11552532621 - 2¹ = 11552532619 is a prime.

It is a super-2 number, since 2×11552532621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11552532661) 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, 11958661 + ... + 11959626.

It is an arithmetic number, because the mean of its divisors is an integer number (1148077824).

Almost surely, 2^11552532621 is an apocalyptic number.

It is an amenable number.

11552532621 is a deficient number, since it is larger than the sum of its proper divisors (6816712563).

11552532621 is a wasteful number, since it uses less digits than its factorization.

11552532621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23918320.

The product of its digits is 18000, while the sum is 33.

The spelling of 11552532621 in words is "eleven billion, five hundred fifty-two million, five hundred thirty-two thousand, six hundred twenty-one".