863888545 has 16 divisors (see below), whose sum is σ = 1117790352. Its totient is φ = 637159680.

The previous prime is 863888521. The next prime is 863888581. The reversal of 863888545 is 545888368.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 305795169 + 558093376 = 17487^2 + 23624^2 .

It is not a de Polignac number, because 863888545 - 2⁹ = 863888033 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47655 + ... + 63235.

It is an arithmetic number, because the mean of its divisors is an integer number (69861897).

Almost surely, 2^863888545 is an apocalyptic number.

It is an amenable number.

863888545 is a deficient number, since it is larger than the sum of its proper divisors (253901807).

863888545 is a wasteful number, since it uses less digits than its factorization.

863888545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16452.

The product of its digits is 7372800, while the sum is 55.

The square root of 863888545 is about 29391.9809642018. The cubic root of 863888545 is about 952.3996748401.

The spelling of 863888545 in words is "eight hundred sixty-three million, eight hundred eighty-eight thousand, five hundred forty-five".