1638818488703 has 8 divisors (see below), whose sum is σ = 1788143821056. Its totient is φ = 1489550128600.

The previous prime is 1638818488679. The next prime is 1638818488717. The reversal of 1638818488703 is 3078848188361.

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

It is a cyclic number.

It is not a de Polignac number, because 1638818488703 - 2³⁶ = 1570099011967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1638818488703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638818418703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14182901 + ... + 14297982.

It is an arithmetic number, because the mean of its divisors is an integer number (223517977632).

Almost surely, 2^{1638818488703} is an apocalyptic number.

1638818488703 is a deficient number, since it is larger than the sum of its proper divisors (149325332353).

1638818488703 is a wasteful number, since it uses less digits than its factorization.

1638818488703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28486125.

The product of its (nonzero) digits is 49545216, while the sum is 65.

The spelling of 1638818488703 in words is "one trillion, six hundred thirty-eight billion, eight hundred eighteen million, four hundred eighty-eight thousand, seven hundred three".