1563630425 has 18 divisors (see below), whose sum is σ = 2255458878. Its totient is φ = 1072202880.

The previous prime is 1563630391. The next prime is 1563630427. The reversal of 1563630425 is 5240363651.

It can be written as a sum of positive squares in 3 ways, for example, as 201725209 + 1361905216 = 14203^2 + 36904^2 .

It is not a de Polignac number, because 1563630425 - 2¹⁸ = 1563368281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1563630427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 636992 + ... + 639441.

It is an arithmetic number, because the mean of its divisors is an integer number (125303271).

Almost surely, 2^1563630425 is an apocalyptic number.

It is an amenable number.

1563630425 is a deficient number, since it is larger than the sum of its proper divisors (691828453).

1563630425 is a wasteful number, since it uses less digits than its factorization.

1563630425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276457 (or 1276445 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 1563630425 is about 39542.7670377276. The cubic root of 1563630425 is about 1160.6769792416.

The spelling of 1563630425 in words is "one billion, five hundred sixty-three million, six hundred thirty thousand, four hundred twenty-five".