1638496495427 has 8 divisors (see below), whose sum is σ = 1790625597120. Its totient is φ = 1486896539560.

The previous prime is 1638496495411. The next prime is 1638496495451. The reversal of 1638496495427 is 7245946948361.

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 1638496495427 - 2⁴ = 1638496495411 is a prime.

It is a super-2 number, since 2×1638496495427² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1638496485427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132279977 + ... + 132292362.

It is an arithmetic number, because the mean of its divisors is an integer number (223828199640).

Almost surely, 2^{1638496495427} is an apocalyptic number.

1638496495427 is a deficient number, since it is larger than the sum of its proper divisors (152129101693).

1638496495427 is a wasteful number, since it uses less digits than its factorization.

1638496495427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264572913.

The product of its digits is 313528320, while the sum is 68.

The spelling of 1638496495427 in words is "one trillion, six hundred thirty-eight billion, four hundred ninety-six million, four hundred ninety-five thousand, four hundred twenty-seven".