265762806056981 has 2 divisors, whose sum is σ = 265762806056982. Its totient is φ = 265762806056980.

The previous prime is 265762806056953. The next prime is 265762806057031. The reversal of 265762806056981 is 189650608267562.

265762806056981 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., 265725698199025 + 37107857956 = 16301095^2 + 192634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265762806056981 is a prime.

It is a super-2 number, since 2×265762806056981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265762806053981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132881403028490 + 132881403028491.

It is an arithmetic number, because the mean of its divisors is an integer number (132881403028491).

Almost surely, 2^{265762806056981} is an apocalyptic number.

It is an amenable number.

265762806056981 is a deficient number, since it is larger than the sum of its proper divisors (1).

265762806056981 is an equidigital number, since it uses as much as digits as its factorization.

265762806056981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 522547200, while the sum is 71.

The spelling of 265762806056981 in words is "two hundred sixty-five trillion, seven hundred sixty-two billion, eight hundred six million, fifty-six thousand, nine hundred eighty-one".