263573315242 has 8 divisors (see below), whose sum is σ = 395624786436. Its totient is φ = 131698386432.

The previous prime is 263573315227. The next prime is 263573315249. The reversal of 263573315242 is 242513375362.

It can be written as a sum of positive squares in 2 ways, for example, as 263570318881 + 2996361 = 513391^2 + 1731^2 .

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

It is not an unprimeable number, because it can be changed into a prime (263573315249) 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, 44131863 + ... + 44137834.

Almost surely, 2^263573315242 is an apocalyptic number.

263573315242 is a deficient number, since it is larger than the sum of its proper divisors (132051471194).

263573315242 is a wasteful number, since it uses less digits than its factorization.

263573315242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88271192.

The product of its digits is 907200, while the sum is 43.

The spelling of 263573315242 in words is "two hundred sixty-three billion, five hundred seventy-three million, three hundred fifteen thousand, two hundred forty-two".