421687105790 has 32 divisors (see below), whose sum is σ = 803787585120. Its totient is φ = 158732729344.

The previous prime is 421687105789. The next prime is 421687105799. The reversal of 421687105790 is 97501786124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421687105799) by changing a digit.

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, 1228226 + ... + 1533594.

It is an arithmetic number, because the mean of its divisors is an integer number (25118362035).

Almost surely, 2^421687105790 is an apocalyptic number.

421687105790 is a deficient number, since it is larger than the sum of its proper divisors (382100479330).

421687105790 is a wasteful number, since it uses less digits than its factorization.

421687105790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313516.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 421687105790 in words is "four hundred twenty-one billion, six hundred eighty-seven million, one hundred five thousand, seven hundred ninety".