601563881421 has 6 divisors (see below), whose sum is σ = 868925606510. Its totient is φ = 401042587608.

The previous prime is 601563881363. The next prime is 601563881449. The reversal of 601563881421 is 124188365106.

601563881421 is a `hidden beast` number, since 6 + 0 + 1 + 5 + 638 + 8 + 1 + 4 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 600646700196 + 917181225 = 775014^2 + 30285^2 .

It is not a de Polignac number, because 601563881421 - 2⁷ = 601563881293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601563881491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33420215626 + ... + 33420215643.

Almost surely, 2^601563881421 is an apocalyptic number.

It is an amenable number.

601563881421 is a deficient number, since it is larger than the sum of its proper divisors (267361725089).

601563881421 is a wasteful number, since it uses less digits than its factorization.

601563881421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66840431275 (or 66840431272 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 601563881421 in words is "six hundred one billion, five hundred sixty-three million, eight hundred eighty-one thousand, four hundred twenty-one".