11257740545 has 4 divisors (see below), whose sum is σ = 13509288660. Its totient is φ = 9006192432.

The previous prime is 11257740491. The next prime is 11257740553. The reversal of 11257740545 is 54504775211.

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 7795477264 + 3462263281 = 88292^2 + 58841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11257740545 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125774050 + ... + 1125774059.

It is an arithmetic number, because the mean of its divisors is an integer number (3377322165).

Almost surely, 2^11257740545 is an apocalyptic number.

It is an amenable number.

11257740545 is a deficient number, since it is larger than the sum of its proper divisors (2251548115).

11257740545 is an equidigital number, since it uses as much as digits as its factorization.

11257740545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251548114.

The product of its (nonzero) digits is 196000, while the sum is 41.

The spelling of 11257740545 in words is "eleven billion, two hundred fifty-seven million, seven hundred forty thousand, five hundred forty-five".