11573587643 has 4 divisors (see below), whose sum is σ = 11842740888. Its totient is φ = 11304434400.

The previous prime is 11573587637. The next prime is 11573587673. The reversal of 11573587643 is 34678537511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11573587643 - 2⁶ = 11573587579 is a prime.

It is a super-4 number, since 4×11573587643⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11573587591 and 11573587600.

It is not an unprimeable number, because it can be changed into a prime (11573587673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134576558 + ... + 134576643.

It is an arithmetic number, because the mean of its divisors is an integer number (2960685222).

Almost surely, 2^11573587643 is an apocalyptic number.

11573587643 is a deficient number, since it is larger than the sum of its proper divisors (269153245).

11573587643 is an equidigital number, since it uses as much as digits as its factorization.

11573587643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269153244.

The product of its digits is 2116800, while the sum is 50.

The spelling of 11573587643 in words is "eleven billion, five hundred seventy-three million, five hundred eighty-seven thousand, six hundred forty-three".