276420252565 has 4 divisors (see below), whose sum is σ = 331704303084. Its totient is φ = 221136202048.

The previous prime is 276420252557. The next prime is 276420252583. The reversal of 276420252565 is 565252024672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208007142084 + 68413110481 = 456078^2 + 261559^2 .

It is a cyclic number.

It is not a de Polignac number, because 276420252565 - 2³ = 276420252557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27642025252 + ... + 27642025261.

It is an arithmetic number, because the mean of its divisors is an integer number (82926075771).

Almost surely, 2^276420252565 is an apocalyptic number.

It is an amenable number.

276420252565 is a deficient number, since it is larger than the sum of its proper divisors (55284050519).

276420252565 is an equidigital number, since it uses as much as digits as its factorization.

276420252565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55284050518.

The product of its (nonzero) digits is 2016000, while the sum is 46.

The spelling of 276420252565 in words is "two hundred seventy-six billion, four hundred twenty million, two hundred fifty-two thousand, five hundred sixty-five".