268607573561 has 2 divisors, whose sum is σ = 268607573562. Its totient is φ = 268607573560.

The previous prime is 268607573459. The next prime is 268607573573. The reversal of 268607573561 is 165375706862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268448334400 + 159239161 = 518120^2 + 12619^2 .

It is a cyclic number.

It is not a de Polignac number, because 268607573561 - 2³⁴ = 251427704377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 268607573497 and 268607573506.

It is not a weakly prime, because it can be changed into another prime (268607573581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134303786780 + 134303786781.

It is an arithmetic number, because the mean of its divisors is an integer number (134303786781).

Almost surely, 2^268607573561 is an apocalyptic number.

It is an amenable number.

268607573561 is a deficient number, since it is larger than the sum of its proper divisors (1).

268607573561 is an equidigital number, since it uses as much as digits as its factorization.

268607573561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 268607573561 in words is "two hundred sixty-eight billion, six hundred seven million, five hundred seventy-three thousand, five hundred sixty-one".