268628520631 has 4 divisors (see below), whose sum is σ = 280308021552. Its totient is φ = 256949019712.

The previous prime is 268628520599. The next prime is 268628520637. The reversal of 268628520631 is 136025826862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268628520631 - 2⁵ = 268628520599 is a prime.

It is a super-2 number, since 2×268628520631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268628520637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5839750426 + ... + 5839750471.

It is an arithmetic number, because the mean of its divisors is an integer number (70077005388).

Almost surely, 2^268628520631 is an apocalyptic number.

268628520631 is a deficient number, since it is larger than the sum of its proper divisors (11679500921).

268628520631 is a wasteful number, since it uses less digits than its factorization.

268628520631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11679500920.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 268628520631 in words is "two hundred sixty-eight billion, six hundred twenty-eight million, five hundred twenty thousand, six hundred thirty-one".