1638007006427 has 6 divisors (see below), whose sum is σ = 1800453982404. Its totient is φ = 1489097278460.

The previous prime is 1638007006417. The next prime is 1638007006429. The reversal of 1638007006427 is 7246007008361.

It is not a de Polignac number, because 1638007006427 - 2⁴ = 1638007006411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1638007006429) 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 5 ways as a sum of consecutive naturals, for example, 6768623873 + ... + 6768624114.

It is an arithmetic number, because the mean of its divisors is an integer number (300075663734).

Almost surely, 2^{1638007006427} is an apocalyptic number.

1638007006427 is a deficient number, since it is larger than the sum of its proper divisors (162446975977).

1638007006427 is a wasteful number, since it uses less digits than its factorization.

1638007006427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13537248009 (or 13537247998 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 1638007006427 in words is "one trillion, six hundred thirty-eight billion, seven million, six thousand, four hundred twenty-seven".