421581239361 has 12 divisors (see below), whose sum is σ = 644771307492. Its totient is φ = 264521561856.

The previous prime is 421581239351. The next prime is 421581239363. The reversal of 421581239361 is 163932185124.

421581239361 is a `hidden beast` number, since 4 + 2 + 1 + 58 + 1 + 239 + 361 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 333585949761 + 87995289600 = 577569^2 + 296640^2 .

It is not a de Polignac number, because 421581239361 - 2¹⁵ = 421581206593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421581239363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1377716316 + ... + 1377716621.

It is an arithmetic number, because the mean of its divisors is an integer number (53730942291).

Almost surely, 2^421581239361 is an apocalyptic number.

It is an amenable number.

421581239361 is a deficient number, since it is larger than the sum of its proper divisors (223190068131).

421581239361 is a wasteful number, since it uses less digits than its factorization.

421581239361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755432960 (or 2755432957 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 421581239361 in words is "four hundred twenty-one billion, five hundred eighty-one million, two hundred thirty-nine thousand, three hundred sixty-one".