11541540578 has 4 divisors (see below), whose sum is σ = 17312310870. Its totient is φ = 5770770288.

The previous prime is 11541540497. The next prime is 11541540581. The reversal of 11541540578 is 87504514511.

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

It can be written as a sum of positive squares in only one way, i.e., 11537552569 + 3988009 = 107413^2 + 1997^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2885385143 + ... + 2885385146.

Almost surely, 2^11541540578 is an apocalyptic number.

11541540578 is a deficient number, since it is larger than the sum of its proper divisors (5770770292).

11541540578 is an equidigital number, since it uses as much as digits as its factorization.

11541540578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5770770291.

The product of its (nonzero) digits is 112000, while the sum is 41.

The spelling of 11541540578 in words is "eleven billion, five hundred forty-one million, five hundred forty thousand, five hundred seventy-eight".