421340090678 has 16 divisors (see below), whose sum is σ = 680964836496. Its totient is φ = 194367932640.

The previous prime is 421340090669. The next prime is 421340090683. The reversal of 421340090678 is 876090043124.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3976901 + ... + 4081472.

It is an arithmetic number, because the mean of its divisors is an integer number (42560302281).

Almost surely, 2^421340090678 is an apocalyptic number.

421340090678 is a deficient number, since it is larger than the sum of its proper divisors (259624745818).

421340090678 is a wasteful number, since it uses less digits than its factorization.

421340090678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060399.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 421340090678 in words is "four hundred twenty-one billion, three hundred forty million, ninety thousand, six hundred seventy-eight".