268536634661 has 8 divisors (see below), whose sum is σ = 272196162048. Its totient is φ = 264896730000.

The previous prime is 268536634643. The next prime is 268536634699. The reversal of 268536634661 is 166436635862.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268536634661 is a prime.

It is a super-2 number, since 2×268536634661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268536634597 and 268536634606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268536634631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4878125 + ... + 4932866.

It is an arithmetic number, because the mean of its divisors is an integer number (34024520256).

Almost surely, 2^268536634661 is an apocalyptic number.

It is an amenable number.

268536634661 is a deficient number, since it is larger than the sum of its proper divisors (3659527387).

268536634661 is a wasteful number, since it uses less digits than its factorization.

268536634661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9811363.

The product of its digits is 22394880, while the sum is 56.

The spelling of 268536634661 in words is "two hundred sixty-eight billion, five hundred thirty-six million, six hundred thirty-four thousand, six hundred sixty-one".