267690552421 has 2 divisors, whose sum is σ = 267690552422. Its totient is φ = 267690552420.

The previous prime is 267690552359. The next prime is 267690552463. The reversal of 267690552421 is 124255096762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267510321796 + 180230625 = 517214^2 + 13425^2 .

It is a cyclic number.

It is not a de Polignac number, because 267690552421 - 2¹³ = 267690544229 is a prime.

It is a super-2 number, since 2×267690552421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (267690352421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133845276210 + 133845276211.

It is an arithmetic number, because the mean of its divisors is an integer number (133845276211).

Almost surely, 2^267690552421 is an apocalyptic number.

It is an amenable number.

267690552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

267690552421 is an equidigital number, since it uses as much as digits as its factorization.

267690552421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 267690552421 in words is "two hundred sixty-seven billion, six hundred ninety million, five hundred fifty-two thousand, four hundred twenty-one".