421561541634 has 32 divisors (see below), whose sum is σ = 853931808000. Its totient is φ = 138719627904.

The previous prime is 421561541633. The next prime is 421561541651. The reversal of 421561541634 is 436145165124.

It is not an unprimeable number, because it can be changed into a prime (421561541633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3046012 + ... + 3181400.

It is an arithmetic number, because the mean of its divisors is an integer number (26685369000).

Almost surely, 2^421561541634 is an apocalyptic number.

421561541634 is an abundant number, since it is smaller than the sum of its proper divisors (432370266366).

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

421561541634 is a wasteful number, since it uses less digits than its factorization.

421561541634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142042.

The product of its digits is 345600, while the sum is 42.

The spelling of 421561541634 in words is "four hundred twenty-one billion, five hundred sixty-one million, five hundred forty-one thousand, six hundred thirty-four".