268609402977 has 4 divisors (see below), whose sum is σ = 358145870640. Its totient is φ = 179072935316.

The previous prime is 268609402951. The next prime is 268609402987. The reversal of 268609402977 is 779204906862.

268609402977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 268609402977 - 2¹² = 268609398881 is a prime.

It is a super-2 number, since 2×268609402977² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 268609402977.

It is not an unprimeable number, because it can be changed into a prime (268609402907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44768233827 + ... + 44768233832.

It is an arithmetic number, because the mean of its divisors is an integer number (89536467660).

Almost surely, 2^268609402977 is an apocalyptic number.

It is an amenable number.

268609402977 is a deficient number, since it is larger than the sum of its proper divisors (89536467663).

268609402977 is an equidigital number, since it uses as much as digits as its factorization.

268609402977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89536467662.

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 268609402977 in words is "two hundred sixty-eight billion, six hundred nine million, four hundred two thousand, nine hundred seventy-seven".