276264820881 has 117 divisors (see below), whose sum is σ = 486779190201. Its totient is φ = 156332936088.

The previous prime is 276264820849. The next prime is 276264820901. The reversal of 276264820881 is 188028462672.

The square root of 276264820881 is 525609.

It is a perfect power (a square), and thus also a powerful number.

276264820881 is a `hidden beast` number, since 2 + 7 + 626 + 4 + 8 + 2 + 0 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 276264820881 - 2⁵ = 276264820849 is a prime.

It is a super-2 number, since 2×276264820881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (276264820681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 116 ways as a sum of consecutive naturals, for example, 2682182676 + ... + 2682182778.

Almost surely, 2^276264820881 is an apocalyptic number.

276264820881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

276264820881 is the 525609-th square number.

276264820881 is the 262805-th centered octagonal number.

It is an amenable number.

276264820881 is a deficient number, since it is larger than the sum of its proper divisors (210514369320).

276264820881 is an frugal number, since it uses more digits than its factorization.

276264820881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 276264820881 in words is "two hundred seventy-six billion, two hundred sixty-four million, eight hundred twenty thousand, eight hundred eighty-one".