261449248727 has 2 divisors, whose sum is σ = 261449248728. Its totient is φ = 261449248726.

The previous prime is 261449248721. The next prime is 261449248757. The reversal of 261449248727 is 727842944162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261449248727 - 2³⁶ = 192729771991 is a prime.

It is a super-2 number, since 2×261449248727² (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 (261449248721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130724624363 + 130724624364.

It is an arithmetic number, because the mean of its divisors is an integer number (130724624364).

Almost surely, 2^261449248727 is an apocalyptic number.

261449248727 is a deficient number, since it is larger than the sum of its proper divisors (1).

261449248727 is an equidigital number, since it uses as much as digits as its factorization.

261449248727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 56.

The spelling of 261449248727 in words is "two hundred sixty-one billion, four hundred forty-nine million, two hundred forty-eight thousand, seven hundred twenty-seven".