267728540641 has 4 divisors (see below), whose sum is σ = 267755894784. Its totient is φ = 267701186500.

The previous prime is 267728540627. The next prime is 267728540669. The reversal of 267728540641 is 146045827762.

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 267728540641 - 2¹¹ = 267728538593 is a prime.

It is a super-3 number, since 3×267728540641³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (267728544641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13662385 + ... + 13681966.

It is an arithmetic number, because the mean of its divisors is an integer number (66938973696).

Almost surely, 2^267728540641 is an apocalyptic number.

It is an amenable number.

267728540641 is a deficient number, since it is larger than the sum of its proper divisors (27354143).

267728540641 is an equidigital number, since it uses as much as digits as its factorization.

267728540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27354142.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 267728540641 in words is "two hundred sixty-seven billion, seven hundred twenty-eight million, five hundred forty thousand, six hundred forty-one".