64745712161 has 8 divisors (see below), whose sum is σ = 69730073280. Its totient is φ = 59761911312.

The previous prime is 64745712061. The next prime is 64745712167. The reversal of 64745712161 is 16121754746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64745712161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64745712167) 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, 117506 + ... + 378548.

It is an arithmetic number, because the mean of its divisors is an integer number (8716259160).

Almost surely, 2^64745712161 is an apocalyptic number.

It is an amenable number.

64745712161 is a deficient number, since it is larger than the sum of its proper divisors (4984361119).

64745712161 is a wasteful number, since it uses less digits than its factorization.

64745712161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280135.

The product of its digits is 282240, while the sum is 44.

The spelling of 64745712161 in words is "sixty-four billion, seven hundred forty-five million, seven hundred twelve thousand, one hundred sixty-one".