421561541604 has 48 divisors (see below), whose sum is σ = 1125091146368. Its totient is φ = 120346829568.

The previous prime is 421561541593. The next prime is 421561541629. The reversal of 421561541604 is 406145165124.

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 in 15 ways as a sum of consecutive naturals, for example, 1966777 + ... + 2170560.

Almost surely, 2^421561541604 is an apocalyptic number.

It is an amenable number.

421561541604 is an abundant number, since it is smaller than the sum of its proper divisors (703529604764).

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

421561541604 is a wasteful number, since it uses less digits than its factorization.

421561541604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138564 (or 4138562 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 421561541604 in words is "four hundred twenty-one billion, five hundred sixty-one million, five hundred forty-one thousand, six hundred four".