276231645 has 12 divisors (see below), whose sum is σ = 478801596. Its totient is φ = 147323520.

The previous prime is 276231619. The next prime is 276231673. The reversal of 276231645 is 546132672.

276231645 is a `hidden beast` number, since 2 + 7 + 6 + 2 + 3 + 1 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66879684 + 209351961 = 8178^2 + 14469^2 .

It is not a de Polignac number, because 276231645 - 2¹⁶ = 276166109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3069196 + ... + 3069285.

It is an arithmetic number, because the mean of its divisors is an integer number (39900133).

Almost surely, 2^276231645 is an apocalyptic number.

It is an amenable number.

276231645 is a deficient number, since it is larger than the sum of its proper divisors (202569951).

276231645 is a wasteful number, since it uses less digits than its factorization.

276231645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138492 (or 6138489 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 276231645 is about 16620.2179588596. The cubic root of 276231645 is about 651.2651061246.

The spelling of 276231645 in words is "two hundred seventy-six million, two hundred thirty-one thousand, six hundred forty-five".