1563196945 has 8 divisors (see below), whose sum is σ = 1877679720. Its totient is φ = 1249328640.

The previous prime is 1563196883. The next prime is 1563196949. The reversal of 1563196945 is 5496913651.

It can be written as a sum of positive squares in 4 ways, for example, as 678967249 + 884229696 = 26057^2 + 29736^2 .

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

It is not a de Polignac number, because 1563196945 - 2¹⁷ = 1563065873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1563196949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148000 + ... + 158209.

It is an arithmetic number, because the mean of its divisors is an integer number (234709965).

Almost surely, 2^1563196945 is an apocalyptic number.

It is an amenable number.

1563196945 is a deficient number, since it is larger than the sum of its proper divisors (314482775).

1563196945 is a wasteful number, since it uses less digits than its factorization.

1563196945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307235.

The product of its digits is 874800, while the sum is 49.

The square root of 1563196945 is about 39537.2855036863. The cubic root of 1563196945 is about 1160.5697124711.

The spelling of 1563196945 in words is "one billion, five hundred sixty-three million, one hundred ninety-six thousand, nine hundred forty-five".