12865641004 has 24 divisors (see below), whose sum is σ = 23852667888. Its totient is φ = 6051018240.

The previous prime is 12865641001. The next prime is 12865641017. The reversal of 12865641004 is 40014656821.

It is a super-2 number, since 2×12865641004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12865641001) 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 7 ways as a sum of consecutive naturals, for example, 70912 + ... + 175384.

It is an arithmetic number, because the mean of its divisors is an integer number (993861162).

Almost surely, 2^12865641004 is an apocalyptic number.

It is an amenable number.

12865641004 is a deficient number, since it is larger than the sum of its proper divisors (10987026884).

12865641004 is a wasteful number, since it uses less digits than its factorization.

12865641004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106305 (or 106303 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 12865641004 in words is "twelve billion, eight hundred sixty-five million, six hundred forty-one thousand, four".