1563742473651 has 16 divisors (see below), whose sum is σ = 2318001695520. Its totient is φ = 1041889201920.

The previous prime is 1563742473641. The next prime is 1563742473679.

1563742473651 is a `hidden beast` number, since 1 + 5 + 6 + 37 + 4 + 247 + 365 + 1 = 666.

1563742473651 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1563742473651 - 2⁵ = 1563742473619 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1563742473611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16779910 + ... + 16872843.

It is an arithmetic number, because the mean of its divisors is an integer number (144875105970).

Almost surely, 2^{1563742473651} is an apocalyptic number.

1563742473651 is a deficient number, since it is larger than the sum of its proper divisors (754259221869).

1563742473651 is a wasteful number, since it uses less digits than its factorization.

1563742473651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33654483 (or 33654477 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The spelling of 1563742473651 in words is "one trillion, five hundred sixty-three billion, seven hundred forty-two million, four hundred seventy-three thousand, six hundred fifty-one".