1638106135305 has 8 divisors (see below), whose sum is σ = 2620969816512. Its totient is φ = 873656605488.

The previous prime is 1638106135291. The next prime is 1638106135321. The reversal of 1638106135305 is 5035316018361.

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

It is not a de Polignac number, because 1638106135305 - 2⁵ = 1638106135273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54603537829 + ... + 54603537858.

It is an arithmetic number, because the mean of its divisors is an integer number (327621227064).

Almost surely, 2^{1638106135305} is an apocalyptic number.

1638106135305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1638106135305 is a deficient number, since it is larger than the sum of its proper divisors (982863681207).

1638106135305 is a wasteful number, since it uses less digits than its factorization.

1638106135305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109207075695.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 1638106135305 in words is "one trillion, six hundred thirty-eight billion, one hundred six million, one hundred thirty-five thousand, three hundred five".