421496526528 has 1344 divisors, whose sum is σ = 1712342016000. Its totient is φ = 99057530880.

The previous prime is 421496526523. The next prime is 421496526571. The reversal of 421496526528 is 825625694124.

421496526528 is a `hidden beast` number, since 4 + 2 + 1 + 4 + 96 + 5 + 26 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a super-3 number, since 3×421496526528³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (421496526523) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 639599863 + ... + 639600521.

It is an arithmetic number, because the mean of its divisors is an integer number (1274064000).

Almost surely, 2^421496526528 is an apocalyptic number.

421496526528 is a gapful number since it is divisible by the number (48) 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 421496526528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856171008000).

421496526528 is an abundant number, since it is smaller than the sum of its proper divisors (1290845489472).

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

421496526528 is a wasteful number, since it uses less digits than its factorization.

421496526528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 724 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 421496526528 in words is "four hundred twenty-one billion, four hundred ninety-six million, five hundred twenty-six thousand, five hundred twenty-eight".