11551531441 has 8 divisors (see below), whose sum is σ = 12284864480. Its totient is φ = 10830734208.

The previous prime is 11551531427. The next prime is 11551531447. The reversal of 11551531441 is 14413515511.

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 11551531441 - 2²⁹ = 11014660529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551531447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3132051 + ... + 3135736.

It is an arithmetic number, because the mean of its divisors is an integer number (1535608060).

Almost surely, 2^11551531441 is an apocalyptic number.

It is an amenable number.

11551531441 is a deficient number, since it is larger than the sum of its proper divisors (733333039).

11551531441 is an equidigital number, since it uses as much as digits as its factorization.

11551531441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267903.

The product of its digits is 6000, while the sum is 31.

The spelling of 11551531441 in words is "eleven billion, five hundred fifty-one million, five hundred thirty-one thousand, four hundred forty-one".