11578948538 has 4 divisors (see below), whose sum is σ = 17368422810. Its totient is φ = 5789474268.

The previous prime is 11578948501. The next prime is 11578948553. The reversal of 11578948538 is 83584987511.

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., 6453390889 + 5125557649 = 80333^2 + 71593^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2894737133 + ... + 2894737136.

Almost surely, 2^11578948538 is an apocalyptic number.

11578948538 is a deficient number, since it is larger than the sum of its proper divisors (5789474272).

11578948538 is an equidigital number, since it uses as much as digits as its factorization.

11578948538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789474271.

The product of its digits is 9676800, while the sum is 59.

The spelling of 11578948538 in words is "eleven billion, five hundred seventy-eight million, nine hundred forty-eight thousand, five hundred thirty-eight".