761818261 has 2 divisors, whose sum is σ = 761818262. Its totient is φ = 761818260.

The previous prime is 761818249. The next prime is 761818283. The reversal of 761818261 is 162818167.

761818261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745617636 + 16200625 = 27306^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 761818261 - 2¹¹ = 761816213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761818201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380909130 + 380909131.

It is an arithmetic number, because the mean of its divisors is an integer number (380909131).

Almost surely, 2^761818261 is an apocalyptic number.

It is an amenable number.

761818261 is a deficient number, since it is larger than the sum of its proper divisors (1).

761818261 is an equidigital number, since it uses as much as digits as its factorization.

761818261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 761818261 is about 27601.0554327185. The cubic root of 761818261 is about 913.3077148260.

The spelling of 761818261 in words is "seven hundred sixty-one million, eight hundred eighteen thousand, two hundred sixty-one".