18126635458 has 12 divisors (see below), whose sum is σ = 28883446002. Its totient is φ = 8530181120.

The previous prime is 18126635447. The next prime is 18126635467. The reversal of 18126635458 is 85453662181.

It can be written as a sum of positive squares in 3 ways, for example, as 16645386289 + 1481249169 = 129017^2 + 38487^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15679903 + ... + 15681058.

Almost surely, 2^18126635458 is an apocalyptic number.

18126635458 is a deficient number, since it is larger than the sum of its proper divisors (10756810544).

18126635458 is a wasteful number, since it uses less digits than its factorization.

18126635458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31360997 (or 31360980 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

The spelling of 18126635458 in words is "eighteen billion, one hundred twenty-six million, six hundred thirty-five thousand, four hundred fifty-eight".