11543002261 has 8 divisors (see below), whose sum is σ = 13968002880. Its totient is φ = 9312001728.

The previous prime is 11543002243. The next prime is 11543002279. The reversal of 11543002261 is 16220034511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11543002243) and next prime (11543002279).

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 11543002261 - 2⁹ = 11543001749 is a prime.

It is a super-2 number, since 2×11543002261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543002561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48499891 + ... + 48500128.

It is an arithmetic number, because the mean of its divisors is an integer number (1746000360).

Almost surely, 2^11543002261 is an apocalyptic number.

It is an amenable number.

11543002261 is a deficient number, since it is larger than the sum of its proper divisors (2425000619).

11543002261 is an equidigital number, since it uses as much as digits as its factorization.

11543002261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97000043.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 11543002261 its reverse (16220034511), we get a palindrome (27763036772).

The spelling of 11543002261 in words is "eleven billion, five hundred forty-three million, two thousand, two hundred sixty-one".