421153254231440 has 40 divisors (see below), whose sum is σ = 979398285976248. Its totient is φ = 168423973539840.

The previous prime is 421153254231383. The next prime is 421153254231497. The reversal of 421153254231440 is 44132452351124.

It is an interprime number because it is at equal distance from previous prime (421153254231383) and next prime (421153254231497).

It can be written as a sum of positive squares in 4 ways, for example, as 3669630634384 + 417483623597056 = 1915628^2 + 20432416^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582889091 + ... + 583611170.

Almost surely, 2^{421153254231440} is an apocalyptic number.

421153254231440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421153254231440 is an abundant number, since it is smaller than the sum of its proper divisors (558245031744808).

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

421153254231440 is a wasteful number, since it uses less digits than its factorization.

421153254231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166504787 (or 1166504781 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 421153254231440 in words is "four hundred twenty-one trillion, one hundred fifty-three billion, two hundred fifty-four million, two hundred thirty-one thousand, four hundred forty".