11912799658 has 4 divisors (see below), whose sum is σ = 17869199490. Its totient is φ = 5956399828.

The previous prime is 11912799641. The next prime is 11912799667. The reversal of 11912799658 is 85699721911.

11912799658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 10125793129 + 1787006529 = 100627^2 + 42273^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2978199913 + ... + 2978199916.

Almost surely, 2^11912799658 is an apocalyptic number.

11912799658 is a deficient number, since it is larger than the sum of its proper divisors (5956399832).

11912799658 is an equidigital number, since it uses as much as digits as its factorization.

11912799658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956399831.

The product of its digits is 2449440, while the sum is 58.

The spelling of 11912799658 in words is "eleven billion, nine hundred twelve million, seven hundred ninety-nine thousand, six hundred fifty-eight".