276776645 has 8 divisors (see below), whose sum is σ = 334052856. Its totient is φ = 220140736.

The previous prime is 276776597. The next prime is 276776651. The reversal of 276776645 is 546677672.

It can be written as a sum of positive squares in 4 ways, for example, as 21224449 + 255552196 = 4607^2 + 15986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 276776645 - 2¹⁶ = 276711109 is a prime.

It is a super-2 number, since 2×276776645² = 153210622434912050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 276776593 and 276776602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159122 + ... + 160851.

It is an arithmetic number, because the mean of its divisors is an integer number (41756607).

Almost surely, 2^276776645 is an apocalyptic number.

It is an amenable number.

276776645 is a deficient number, since it is larger than the sum of its proper divisors (57276211).

276776645 is a wasteful number, since it uses less digits than its factorization.

276776645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320151.

The product of its digits is 2963520, while the sum is 50.

The square root of 276776645 is about 16636.6055732532. The cubic root of 276776645 is about 651.6931361434.

The spelling of 276776645 in words is "two hundred seventy-six million, seven hundred seventy-six thousand, six hundred forty-five".