1638989464070 has 32 divisors (see below), whose sum is σ = 3371722488576. Its totient is φ = 561924741600.

The previous prime is 1638989464067. The next prime is 1638989464093. The reversal of 1638989464070 is 704649898361.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1638989463988 and 1638989464006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2631425 + ... + 3194115.

It is an arithmetic number, because the mean of its divisors is an integer number (105366327768).

Almost surely, 2^{1638989464070} is an apocalyptic number.

1638989464070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1638989464070 is an abundant number, since it is smaller than the sum of its proper divisors (1732733024506).

1638989464070 is a wasteful number, since it uses less digits than its factorization.

1638989464070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604316.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 1638989464070 in words is "one trillion, six hundred thirty-eight billion, nine hundred eighty-nine million, four hundred sixty-four thousand, seventy".