421503763738 has 8 divisors (see below), whose sum is σ = 632936224980. Its totient is φ = 210525022080.

The previous prime is 421503763729. The next prime is 421503763741. The reversal of 421503763738 is 837367305124.

It can be written as a sum of positive squares in 2 ways, for example, as 304137911169 + 117365852569 = 551487^2 + 342587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 421503763691 and 421503763700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113427573 + ... + 113431288.

Almost surely, 2^421503763738 is an apocalyptic number.

421503763738 is a deficient number, since it is larger than the sum of its proper divisors (211432461242).

421503763738 is a wasteful number, since it uses less digits than its factorization.

421503763738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226859792.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 421503763738 in words is "four hundred twenty-one billion, five hundred three million, seven hundred sixty-three thousand, seven hundred thirty-eight".