12435809818 has 8 divisors (see below), whose sum is σ = 18654187860. Its totient is φ = 6217747200.

The previous prime is 12435809761. The next prime is 12435809843. The reversal of 12435809818 is 81890853421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8221592929 + 4214216889 = 90673^2 + 64917^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 117148 + ... + 196456.

Almost surely, 2^12435809818 is an apocalyptic number.

12435809818 is a deficient number, since it is larger than the sum of its proper divisors (6218378042).

12435809818 is an equidigital number, since it uses as much as digits as its factorization.

12435809818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157712.

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 12435809818 in words is "twelve billion, four hundred thirty-five million, eight hundred nine thousand, eight hundred eighteen".