64679767171 has 4 divisors (see below), whose sum is σ = 66910104000. Its totient is φ = 62449430344.

The previous prime is 64679767169. The next prime is 64679767231. The reversal of 64679767171 is 17176797646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17176797646 = 2 ⋅8588398823.

It is a cyclic number.

It is not a de Polignac number, because 64679767171 - 2¹ = 64679767169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64679767151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115168371 + ... + 1115168428.

It is an arithmetic number, because the mean of its divisors is an integer number (16727526000).

Almost surely, 2^64679767171 is an apocalyptic number.

64679767171 is a deficient number, since it is larger than the sum of its proper divisors (2230336829).

64679767171 is a wasteful number, since it uses less digits than its factorization.

64679767171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230336828.

The product of its digits is 18670176, while the sum is 61.

The spelling of 64679767171 in words is "sixty-four billion, six hundred seventy-nine million, seven hundred sixty-seven thousand, one hundred seventy-one".