421643504628 has 36 divisors (see below), whose sum is σ = 1067116199968. Its totient is φ = 140377050000.

The previous prime is 421643504627. The next prime is 421643504629. The reversal of 421643504628 is 826405346124.

421643504628 is a `hidden beast` number, since 4 + 2 + 16 + 4 + 3 + 5 + 0 + 4 + 628 = 666.

It is an interprime number because it is at equal distance from previous prime (421643504627) and next prime (421643504629).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421643504627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7085998 + ... + 7145253.

Almost surely, 2^421643504628 is an apocalyptic number.

It is an amenable number.

421643504628 is an abundant number, since it is smaller than the sum of its proper divisors (645472695340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421643504628 is a wasteful number, since it uses less digits than its factorization.

421643504628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14232084 (or 14232079 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 421643504628 in words is "four hundred twenty-one billion, six hundred forty-three million, five hundred four thousand, six hundred twenty-eight".