276735645 has 12 divisors (see below), whose sum is σ = 479675196. Its totient is φ = 147592320.

The previous prime is 276735637. The next prime is 276735649. The reversal of 276735645 is 546537672.

276735645 is a `hidden beast` number, since 27 + 67 + 3 + 564 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 86378436 + 190357209 = 9294^2 + 13797^2 .

It is not a de Polignac number, because 276735645 - 2³ = 276735637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 6149681 = 276735645 / (2 + 7 + 6 + 7 + 3 + 5 + 6 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 276735645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276735649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3074796 + ... + 3074885.

It is an arithmetic number, because the mean of its divisors is an integer number (39972933).

Almost surely, 2^276735645 is an apocalyptic number.

It is an amenable number.

276735645 is a deficient number, since it is larger than the sum of its proper divisors (202939551).

276735645 is a wasteful number, since it uses less digits than its factorization.

276735645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149692 (or 6149689 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 276735645 is about 16635.3733050990. The cubic root of 276735645 is about 651.6609552754.

The spelling of 276735645 in words is "two hundred seventy-six million, seven hundred thirty-five thousand, six hundred forty-five".