263211242545 has 8 divisors (see below), whose sum is σ = 315867693096. Its totient is φ = 210559526016.

The previous prime is 263211242531. The next prime is 263211242549. The reversal of 263211242545 is 545242112362.

It can be written as a sum of positive squares in 4 ways, for example, as 31187913201 + 232023329344 = 176601^2 + 481688^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 263211242545 - 2¹¹ = 263211240497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263211242549) 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, 1060012 + ... + 1284541.

It is an arithmetic number, because the mean of its divisors is an integer number (39483461637).

Almost surely, 2^263211242545 is an apocalyptic number.

It is an amenable number.

263211242545 is a deficient number, since it is larger than the sum of its proper divisors (52656450551).

263211242545 is a wasteful number, since it uses less digits than its factorization.

263211242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367011.

The product of its digits is 115200, while the sum is 37.

The spelling of 263211242545 in words is "two hundred sixty-three billion, two hundred eleven million, two hundred forty-two thousand, five hundred forty-five".