276264820681 has 2 divisors, whose sum is σ = 276264820682. Its totient is φ = 276264820680.

The previous prime is 276264820631. The next prime is 276264820703. The reversal of 276264820681 is 186028462672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154893409225 + 121371411456 = 393565^2 + 348384^2 .

It is a cyclic number.

It is not a de Polignac number, because 276264820681 - 2³⁵ = 241905082313 is a prime.

It is a super-2 number, since 2×276264820681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276264820631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138132410340 + 138132410341.

It is an arithmetic number, because the mean of its divisors is an integer number (138132410341).

Almost surely, 2^276264820681 is an apocalyptic number.

It is an amenable number.

276264820681 is a deficient number, since it is larger than the sum of its proper divisors (1).

276264820681 is an equidigital number, since it uses as much as digits as its factorization.

276264820681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 276264820681 in words is "two hundred seventy-six billion, two hundred sixty-four million, eight hundred twenty thousand, six hundred eighty-one".