1538775265 has 16 divisors (see below), whose sum is σ = 1883980800. Its totient is φ = 1206247680.

The previous prime is 1538775221. The next prime is 1538775269. The reversal of 1538775265 is 5625778351.

It is not a de Polignac number, because 1538775265 - 2⁷ = 1538775137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1538775269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51961 + ... + 76009.

It is an arithmetic number, because the mean of its divisors is an integer number (117748800).

Almost surely, 2^1538775265 is an apocalyptic number.

It is an amenable number.

1538775265 is a deficient number, since it is larger than the sum of its proper divisors (345205535).

1538775265 is a wasteful number, since it uses less digits than its factorization.

1538775265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24312.

The product of its digits is 1764000, while the sum is 49.

The square root of 1538775265 is about 39227.2260681277. The cubic root of 1538775265 is about 1154.4941382781.

The spelling of 1538775265 in words is "one billion, five hundred thirty-eight million, seven hundred seventy-five thousand, two hundred sixty-five".