1638984049293 has 32 divisors (see below), whose sum is σ = 2403714216960. Its totient is φ = 988869473280.

The previous prime is 1638984049189. The next prime is 1638984049319. The reversal of 1638984049293 is 3929404898361.

It is not a de Polignac number, because 1638984049293 - 2⁸ = 1638984049037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638984049793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3053298 + ... + 3549731.

It is an arithmetic number, because the mean of its divisors is an integer number (75116069280).

Almost surely, 2^{1638984049293} is an apocalyptic number.

It is an amenable number.

1638984049293 is a deficient number, since it is larger than the sum of its proper divisors (764730167667).

1638984049293 is a wasteful number, since it uses less digits than its factorization.

1638984049293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603237.

The product of its (nonzero) digits is 80621568, while the sum is 66.

The spelling of 1638984049293 in words is "one trillion, six hundred thirty-eight billion, nine hundred eighty-four million, forty-nine thousand, two hundred ninety-three".