11543262457 has 4 divisors (see below), whose sum is σ = 11941306020. Its totient is φ = 11145218896.

The previous prime is 11543262449. The next prime is 11543262461. The reversal of 11543262457 is 75426234511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1799795776 + 9743466681 = 42424^2 + 98709^2 .

It is a cyclic number.

It is not a de Polignac number, because 11543262457 - 2³ = 11543262449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543262487) 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, 199021738 + ... + 199021795.

It is an arithmetic number, because the mean of its divisors is an integer number (2985326505).

Almost surely, 2^11543262457 is an apocalyptic number.

It is an amenable number.

11543262457 is a deficient number, since it is larger than the sum of its proper divisors (398043563).

11543262457 is an equidigital number, since it uses as much as digits as its factorization.

11543262457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398043562.

The product of its digits is 201600, while the sum is 40.

Adding to 11543262457 its reverse (75426234511), we get a palindrome (86969496968).

The spelling of 11543262457 in words is "eleven billion, five hundred forty-three million, two hundred sixty-two thousand, four hundred fifty-seven".