267457893086981 has 2 divisors, whose sum is σ = 267457893086982. Its totient is φ = 267457893086980.

The previous prime is 267457893086963. The next prime is 267457893087067. The reversal of 267457893086981 is 189680398754762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138041468301025 + 129416424785956 = 11749105^2 + 11376134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-267457893086981 is a prime.

It is a super-2 number, since 2×267457893086981² (a number of 30 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 267457893086981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (267457893086281) 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 as a sum of consecutive naturals, namely, 133728946543490 + 133728946543491.

It is an arithmetic number, because the mean of its divisors is an integer number (133728946543491).

It is a 1-persistent number, because it is pandigital, but 2⋅267457893086981 = 534915786173962 is not.

Almost surely, 2^{267457893086981} is an apocalyptic number.

It is an amenable number.

267457893086981 is a deficient number, since it is larger than the sum of its proper divisors (1).

267457893086981 is an equidigital number, since it uses as much as digits as its factorization.

267457893086981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8778792960, while the sum is 83.

The spelling of 267457893086981 in words is "two hundred sixty-seven trillion, four hundred fifty-seven billion, eight hundred ninety-three million, eighty-six thousand, nine hundred eighty-one".