263641602243 has 16 divisors (see below), whose sum is σ = 354447830016. Its totient is φ = 174303107520.

The previous prime is 263641602241. The next prime is 263641602251. The reversal of 263641602243 is 342206146362.

It is not a de Polignac number, because 263641602243 - 2¹ = 263641602241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263641602241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394546 + ... + 826407.

It is an arithmetic number, because the mean of its divisors is an integer number (22152989376).

Almost surely, 2^263641602243 is an apocalyptic number.

263641602243 is a deficient number, since it is larger than the sum of its proper divisors (90806227773).

263641602243 is a wasteful number, since it uses less digits than its factorization.

263641602243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221554.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 263641602243 in words is "two hundred sixty-three billion, six hundred forty-one million, six hundred two thousand, two hundred forty-three".