421261564512 has 48 divisors (see below), whose sum is σ = 1121386436352. Its totient is φ = 138442765440.

The previous prime is 421261564501. The next prime is 421261564513. The reversal of 421261564512 is 215465162124.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×421261564512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421261564513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30895588 + ... + 30909219.

It is an arithmetic number, because the mean of its divisors is an integer number (23362217424).

Almost surely, 2^421261564512 is an apocalyptic number.

It is an amenable number.

421261564512 is an abundant number, since it is smaller than the sum of its proper divisors (700124871840).

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

421261564512 is a wasteful number, since it uses less digits than its factorization.

421261564512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61804891 (or 61804883 counting only the distinct ones).

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

The spelling of 421261564512 in words is "four hundred twenty-one billion, two hundred sixty-one million, five hundred sixty-four thousand, five hundred twelve".