263956250778 has 128 divisors (see below), whose sum is σ = 609688304640. Its totient is φ = 76071441600.

The previous prime is 263956250773. The next prime is 263956250851. The reversal of 263956250778 is 877052659362.

It is not an unprimeable number, because it can be changed into a prime (263956250773) by changing a digit.

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 in 63 ways as a sum of consecutive naturals, for example, 15508293 + ... + 15525303.

It is an arithmetic number, because the mean of its divisors is an integer number (4763189880).

Almost surely, 2^263956250778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263956250778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304844152320).

263956250778 is an abundant number, since it is smaller than the sum of its proper divisors (345732053862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263956250778 is a wasteful number, since it uses less digits than its factorization.

263956250778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17145 (or 17123 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 263956250778 in words is "two hundred sixty-three billion, nine hundred fifty-six million, two hundred fifty thousand, seven hundred seventy-eight".