421525340153344 has 80 divisors (see below), whose sum is σ = 975731143593888. Its totient is φ = 178179008643072.

The previous prime is 421525340153329. The next prime is 421525340153363. The reversal of 421525340153344 is 443351043525124.

It is a happy number.

It is a super-2 number, since 2×421525340153344² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421525340153294 and 421525340153303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805307527 + ... + 805830790.

Almost surely, 2^{421525340153344} is an apocalyptic number.

It is an amenable number.

421525340153344 is an abundant number, since it is smaller than the sum of its proper divisors (554205803440544).

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

421525340153344 is an equidigital number, since it uses as much as digits as its factorization.

421525340153344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611138415 (or 1611138399 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 46.

Adding to 421525340153344 its reverse (443351043525124), we get a palindrome (864876383678468).

The spelling of 421525340153344 in words is "four hundred twenty-one trillion, five hundred twenty-five billion, three hundred forty million, one hundred fifty-three thousand, three hundred forty-four".