421313620738 has 4 divisors (see below), whose sum is σ = 631970431110. Its totient is φ = 210656810368.

The previous prime is 421313620649. The next prime is 421313620769. The reversal of 421313620738 is 837026313124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 421249027369 + 64593369 = 649037^2 + 8037^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421313620738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105328405183 + ... + 105328405186.

Almost surely, 2^421313620738 is an apocalyptic number.

421313620738 is a deficient number, since it is larger than the sum of its proper divisors (210656810372).

421313620738 is a wasteful number, since it uses less digits than its factorization.

421313620738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210656810371.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 421313620738 in words is "four hundred twenty-one billion, three hundred thirteen million, six hundred twenty thousand, seven hundred thirty-eight".