2563145636 has 6 divisors (see below), whose sum is σ = 4485504870. Its totient is φ = 1281572816.

The previous prime is 2563145617. The next prime is 2563145647. The reversal of 2563145636 is 6365413652.

It can be written as a sum of positive squares in only one way, i.e., 1631675236 + 931470400 = 40394^2 + 30520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2563145593 and 2563145602.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 320393201 + ... + 320393208.

It is an arithmetic number, because the mean of its divisors is an integer number (747584145).

Almost surely, 2^2563145636 is an apocalyptic number.

It is an amenable number.

2563145636 is a deficient number, since it is larger than the sum of its proper divisors (1922359234).

2563145636 is a wasteful number, since it uses less digits than its factorization.

2563145636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640786413 (or 640786411 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 2563145636 is about 50627.5185645119. The cubic root of 2563145636 is about 1368.5408365332.

The spelling of 2563145636 in words is "two billion, five hundred sixty-three million, one hundred forty-five thousand, six hundred thirty-six".