1638013177323 has 12 divisors (see below), whose sum is σ = 2366066761968. Its totient is φ = 1091986756560.

The previous prime is 1638013177303. The next prime is 1638013177337. The reversal of 1638013177323 is 3237713108361.

1638013177323 is a `hidden beast` number, since 1 + 6 + 3 + 8 + 0 + 1 + 317 + 7 + 323 = 666.

It is not a de Polignac number, because 1638013177323 - 2¹⁰ = 1638013176299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1638013177303) 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 11 ways as a sum of consecutive naturals, for example, 1358215 + ... + 2262912.

It is an arithmetic number, because the mean of its divisors is an integer number (197172230164).

Almost surely, 2^{1638013177323} is an apocalyptic number.

1638013177323 is a deficient number, since it is larger than the sum of its proper divisors (728053584645).

1638013177323 is a wasteful number, since it uses less digits than its factorization.

1638013177323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671394 (or 3671391 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 1638013177323 in words is "one trillion, six hundred thirty-eight billion, thirteen million, one hundred seventy-seven thousand, three hundred twenty-three".