64815944025603 has 32 divisors (see below), whose sum is σ = 89898078816000. Its totient is φ = 41488793136000.

The previous prime is 64815944025559. The next prime is 64815944025607. The reversal of 64815944025603 is 30652044951846.

It is a happy number.

It is not a de Polignac number, because 64815944025603 - 2⁸ = 64815944025347 is a prime.

It is a super-2 number, since 2×64815944025603² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64815944025607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845559828 + ... + 845636478.

It is an arithmetic number, because the mean of its divisors is an integer number (2809314963000).

Almost surely, 2^{64815944025603} is an apocalyptic number.

64815944025603 is a deficient number, since it is larger than the sum of its proper divisors (25082134790397).

64815944025603 is a wasteful number, since it uses less digits than its factorization.

64815944025603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130563.

The product of its (nonzero) digits is 24883200, while the sum is 57.

The spelling of 64815944025603 in words is "sixty-four trillion, eight hundred fifteen billion, nine hundred forty-four million, twenty-five thousand, six hundred three".