245636563 has 4 divisors (see below), whose sum is σ = 248021488. Its totient is φ = 243251640.

The previous prime is 245636557. The next prime is 245636603. The reversal of 245636563 is 365636542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365636542 = 2 ⋅182818271.

It is a cyclic number.

It is not a de Polignac number, because 245636563 - 2²¹ = 243539411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245636063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192308 + ... + 1192513.

It is an arithmetic number, because the mean of its divisors is an integer number (62005372).

Almost surely, 2^245636563 is an apocalyptic number.

245636563 is a deficient number, since it is larger than the sum of its proper divisors (2384925).

245636563 is a wasteful number, since it uses less digits than its factorization.

245636563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384924.

The product of its digits is 388800, while the sum is 40.

The square root of 245636563 is about 15672.7969105709. The cubic root of 245636563 is about 626.2739353378.

The spelling of 245636563 in words is "two hundred forty-five million, six hundred thirty-six thousand, five hundred sixty-three".