563139981261 has 64 divisors (see below), whose sum is σ = 982086819840. Its totient is φ = 314415933120.

The previous prime is 563139981259. The next prime is 563139981289. The reversal of 563139981261 is 162189931365.

563139981261 is a `hidden beast` number, since 563 + 1 + 3 + 9 + 9 + 8 + 12 + 61 = 666.

563139981261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 563139981261 - 2¹ = 563139981259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 563139981198 and 563139981207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563139981211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1797100 + ... + 2087066.

It is an arithmetic number, because the mean of its divisors is an integer number (15345106560).

Almost surely, 2^563139981261 is an apocalyptic number.

It is an amenable number.

563139981261 is a deficient number, since it is larger than the sum of its proper divisors (418946838579).

563139981261 is a wasteful number, since it uses less digits than its factorization.

563139981261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290503 (or 290497 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 563139981261 in words is "five hundred sixty-three billion, one hundred thirty-nine million, nine hundred eighty-one thousand, two hundred sixty-one".