11506503898 has 4 divisors (see below), whose sum is σ = 17259755850. Its totient is φ = 5753251948.

The previous prime is 11506503791. The next prime is 11506503923. The reversal of 11506503898 is 89830560511.

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., 6150166929 + 5356336969 = 78423^2 + 73187^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2876625973 + ... + 2876625976.

Almost surely, 2^11506503898 is an apocalyptic number.

11506503898 is a deficient number, since it is larger than the sum of its proper divisors (5753251952).

11506503898 is an equidigital number, since it uses as much as digits as its factorization.

11506503898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753251951.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 11506503898 in words is "eleven billion, five hundred six million, five hundred three thousand, eight hundred ninety-eight".