268723260657541 has 4 divisors (see below), whose sum is σ = 274440776841792. Its totient is φ = 263005744473292.

The previous prime is 268723260657517. The next prime is 268723260657581. The reversal of 268723260657541 is 145756062327862.

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 268723260657541 - 2²¹ = 268723258560389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268723260657581) 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, 2858758092055 + ... + 2858758092148.

It is an arithmetic number, because the mean of its divisors is an integer number (68610194210448).

Almost surely, 2^{268723260657541} is an apocalyptic number.

It is an amenable number.

268723260657541 is a deficient number, since it is larger than the sum of its proper divisors (5717516184251).

268723260657541 is an equidigital number, since it uses as much as digits as its factorization.

268723260657541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717516184250.

The product of its (nonzero) digits is 203212800, while the sum is 64.

The spelling of 268723260657541 in words is "two hundred sixty-eight trillion, seven hundred twenty-three billion, two hundred sixty million, six hundred fifty-seven thousand, five hundred forty-one".