64672317155 has 8 divisors (see below), whose sum is σ = 78765091152. Its totient is φ = 50965646688.

The previous prime is 64672317139. The next prime is 64672317221. The reversal of 64672317155 is 55171327646.

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 64672317155 - 2⁴ = 64672317139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96525512 + ... + 96526181.

It is an arithmetic number, because the mean of its divisors is an integer number (9845636394).

Almost surely, 2^64672317155 is an apocalyptic number.

64672317155 is a deficient number, since it is larger than the sum of its proper divisors (14092773997).

64672317155 is a wasteful number, since it uses less digits than its factorization.

64672317155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193051765.

The product of its digits is 1058400, while the sum is 47.

The spelling of 64672317155 in words is "sixty-four billion, six hundred seventy-two million, three hundred seventeen thousand, one hundred fifty-five".