262339755481981 has 2 divisors, whose sum is σ = 262339755481982. Its totient is φ = 262339755481980.

The previous prime is 262339755481949. The next prime is 262339755482069. The reversal of 262339755481981 is 189184557933262.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258833686479481 + 3506069002500 = 16088309^2 + 1872450^2 .

It is a cyclic number.

It is not a de Polignac number, because 262339755481981 - 2⁵ = 262339755481949 is a prime.

It is a super-2 number, since 2×262339755481981² (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 (262339755481681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131169877740990 + 131169877740991.

It is an arithmetic number, because the mean of its divisors is an integer number (131169877740991).

Almost surely, 2^{262339755481981} is an apocalyptic number.

It is an amenable number.

262339755481981 is a deficient number, since it is larger than the sum of its proper divisors (1).

262339755481981 is an equidigital number, since it uses as much as digits as its factorization.

262339755481981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 783820800, while the sum is 73.

The spelling of 262339755481981 in words is "two hundred sixty-two trillion, three hundred thirty-nine billion, seven hundred fifty-five million, four hundred eighty-one thousand, nine hundred eighty-one".