1138523545 has 4 divisors (see below), whose sum is σ = 1366228260. Its totient is φ = 910818832.

The previous prime is 1138523539. The next prime is 1138523579. The reversal of 1138523545 is 5453258311.

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 653466969 + 485056576 = 25563^2 + 22024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138523545 - 2³ = 1138523537 is a prime.

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, 113852350 + ... + 113852359.

It is an arithmetic number, because the mean of its divisors is an integer number (341557065).

Almost surely, 2^1138523545 is an apocalyptic number.

It is an amenable number.

1138523545 is a deficient number, since it is larger than the sum of its proper divisors (227704715).

1138523545 is an equidigital number, since it uses as much as digits as its factorization.

1138523545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227704714.

The product of its digits is 72000, while the sum is 37.

The square root of 1138523545 is about 33742.0145367760. The cubic root of 1138523545 is about 1044.1927466796.

The spelling of 1138523545 in words is "one billion, one hundred thirty-eight million, five hundred twenty-three thousand, five hundred forty-five".