421134464520 has 2016 divisors, whose sum is σ = 1927941825600. Its totient is φ = 80964956160.

The previous prime is 421134464489. The next prime is 421134464533. The reversal of 421134464520 is 25464431124.

421134464520 is a `hidden beast` number, since 4 + 2 + 1 + 1 + 3 + 4 + 4 + 645 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 503 ways as a sum of consecutive naturals, for example, 7137872251 + ... + 7137872309.

It is an arithmetic number, because the mean of its divisors is an integer number (956320350).

Almost surely, 2^421134464520 is an apocalyptic number.

421134464520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421134464520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963970912800).

421134464520 is an abundant number, since it is smaller than the sum of its proper divisors (1506807361080).

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

421134464520 is a wasteful number, since it uses less digits than its factorization.

421134464520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 421134464520 its reverse (25464431124), we get a palindrome (446598895644).

The spelling of 421134464520 in words is "four hundred twenty-one billion, one hundred thirty-four million, four hundred sixty-four thousand, five hundred twenty".