268298078561 has 4 divisors (see below), whose sum is σ = 268410669312. Its totient is φ = 268185487812.

The previous prime is 268298078551. The next prime is 268298078591. The reversal of 268298078561 is 165870892862.

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 268298078561 - 2⁶ = 268298078497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268298078494 and 268298078503.

It is not an unprimeable number, because it can be changed into a prime (268298078551) 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, 56291801 + ... + 56296566.

It is an arithmetic number, because the mean of its divisors is an integer number (67102667328).

Almost surely, 2^268298078561 is an apocalyptic number.

It is an amenable number.

268298078561 is a deficient number, since it is larger than the sum of its proper divisors (112590751).

268298078561 is a wasteful number, since it uses less digits than its factorization.

268298078561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112590750.

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 268298078561 in words is "two hundred sixty-eight billion, two hundred ninety-eight million, seventy-eight thousand, five hundred sixty-one".