563402642125661 has 8 divisors (see below), whose sum is σ = 610605901218264. Its totient is φ = 516751467935040.

The previous prime is 563402642125627. The next prime is 563402642125663. The reversal of 563402642125661 is 166521246204365.

It can be written as a sum of positive squares in 4 ways, for example, as 52132305625 + 563350509820036 = 228325^2 + 23735006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 563402642125661 - 2²⁶ = 563402575016797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563402642125663) by changing a digit.

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, 138021223370 + ... + 138021227451.

It is an arithmetic number, because the mean of its divisors is an integer number (76325737652283).

Almost surely, 2^{563402642125661} is an apocalyptic number.

It is an amenable number.

563402642125661 is a deficient number, since it is larger than the sum of its proper divisors (47203259092603).

563402642125661 is a wasteful number, since it uses less digits than its factorization.

563402642125661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276042450991.

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 563402642125661 in words is "five hundred sixty-three trillion, four hundred two billion, six hundred forty-two million, one hundred twenty-five thousand, six hundred sixty-one".