11644220541 has 8 divisors (see below), whose sum is σ = 15527403040. Its totient is φ = 7761925872.

The previous prime is 11644220513. The next prime is 11644220587. The reversal of 11644220541 is 14502244611.

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

It is not a de Polignac number, because 11644220541 - 2¹⁵ = 11644187773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11644220499 and 11644220508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644224541) 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, 190726 + ... + 244263.

It is an arithmetic number, because the mean of its divisors is an integer number (1940925380).

Almost surely, 2^11644220541 is an apocalyptic number.

It is an amenable number.

11644220541 is a deficient number, since it is larger than the sum of its proper divisors (3883182499).

11644220541 is an equidigital number, since it uses as much as digits as its factorization.

11644220541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443915.

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 11644220541 in words is "eleven billion, six hundred forty-four million, two hundred twenty thousand, five hundred forty-one".