865664386148 has 6 divisors (see below), whose sum is σ = 1514912675766. Its totient is φ = 432832193072.

The previous prime is 865664386133. The next prime is 865664386159. The reversal of 865664386148 is 841683466568.

It can be written as a sum of positive squares in only one way, i.e., 684488166244 + 181176219904 = 827338^2 + 425648^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108208048265 + ... + 108208048272.

It is an arithmetic number, because the mean of its divisors is an integer number (252485445961).

Almost surely, 2^865664386148 is an apocalyptic number.

It is an amenable number.

865664386148 is a deficient number, since it is larger than the sum of its proper divisors (649248289618).

865664386148 is a wasteful number, since it uses less digits than its factorization.

865664386148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216416096541 (or 216416096539 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 65.

The spelling of 865664386148 in words is "eight hundred sixty-five billion, six hundred sixty-four million, three hundred eighty-six thousand, one hundred forty-eight".