64118515589873 has 8 divisors (see below), whose sum is σ = 64137130295400. Its totient is φ = 64099902700288.

The previous prime is 64118515589867. The next prime is 64118515589879. The reversal of 64118515589873 is 37898551581146.

It is an interprime number because it is at equal distance from previous prime (64118515589867) and next prime (64118515589879).

It can be written as a sum of positive squares in 4 ways, for example, as 43568540818609 + 20549974771264 = 6600647^2 + 4533208^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64118515589873 - 2¹⁸ = 64118515327729 is a prime.

It is a super-2 number, since 2×64118515589873² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64118515589797 and 64118515589806.

It is not an unprimeable number, because it can be changed into a prime (64118515589879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71837783 + ... + 72724851.

It is an arithmetic number, because the mean of its divisors is an integer number (8017141286925).

Almost surely, 2^{64118515589873} is an apocalyptic number.

It is an amenable number.

64118515589873 is a deficient number, since it is larger than the sum of its proper divisors (18614705527).

64118515589873 is a wasteful number, since it uses less digits than its factorization.

64118515589873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907971.

The product of its digits is 290304000, while the sum is 71.

The spelling of 64118515589873 in words is "sixty-four trillion, one hundred eighteen billion, five hundred fifteen million, five hundred eighty-nine thousand, eight hundred seventy-three".