268918250513 has 4 divisors (see below), whose sum is σ = 293365364208. Its totient is φ = 244471136820.

The previous prime is 268918250507. The next prime is 268918250521. The reversal of 268918250513 is 315052819862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 268918250513 - 2¹² = 268918246417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268918252513) 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, 12223556831 + ... + 12223556852.

It is an arithmetic number, because the mean of its divisors is an integer number (73341341052).

Almost surely, 2^268918250513 is an apocalyptic number.

It is an amenable number.

268918250513 is a deficient number, since it is larger than the sum of its proper divisors (24447113695).

268918250513 is a wasteful number, since it uses less digits than its factorization.

268918250513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24447113694.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 268918250513 in words is "two hundred sixty-eight billion, nine hundred eighteen million, two hundred fifty thousand, five hundred thirteen".