1563471281961 has 24 divisors (see below), whose sum is σ = 2279241536000. Its totient is φ = 1032672216672.

The previous prime is 1563471281947. The next prime is 1563471281969. The reversal of 1563471281961 is 1691821743651.

1563471281961 is a `hidden beast` number, since 1 + 5 + 6 + 3 + 471 + 2 + 81 + 96 + 1 = 666.

It is not a de Polignac number, because 1563471281961 - 2¹⁰ = 1563471280937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1563471281898 and 1563471281907.

It is not an unprimeable number, because it can be changed into a prime (1563471281969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14444280 + ... + 14552118.

Almost surely, 2^{1563471281961} is an apocalyptic number.

It is an amenable number.

1563471281961 is a deficient number, since it is larger than the sum of its proper divisors (715770254039).

1563471281961 is a wasteful number, since it uses less digits than its factorization.

1563471281961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122733 (or 122730 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 1563471281961 in words is "one trillion, five hundred sixty-three billion, four hundred seventy-one million, two hundred eighty-one thousand, nine hundred sixty-one".