1634995265 has 4 divisors (see below), whose sum is σ = 1961994324. Its totient is φ = 1307996208.

The previous prime is 1634995259. The next prime is 1634995291. The reversal of 1634995265 is 5625994361.

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 1005587521 + 629407744 = 31711^2 + 25088^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634995265 - 2⁴ = 1634995249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163499522 + ... + 163499531.

It is an arithmetic number, because the mean of its divisors is an integer number (490498581).

Almost surely, 2^1634995265 is an apocalyptic number.

It is an amenable number.

1634995265 is a deficient number, since it is larger than the sum of its proper divisors (326999059).

1634995265 is an equidigital number, since it uses as much as digits as its factorization.

1634995265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326999058.

The product of its digits is 1749600, while the sum is 50.

The square root of 1634995265 is about 40435.0746877015. The cubic root of 1634995265 is about 1178.0729018560.

The spelling of 1634995265 in words is "one billion, six hundred thirty-four million, nine hundred ninety-five thousand, two hundred sixty-five".