64601671 has 4 divisors (see below), whose sum is σ = 64746000. Its totient is φ = 64457344.

The previous prime is 64601657. The next prime is 64601689. The reversal of 64601671 is 17610646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17610646 = 2 ⋅8805323.

It is a cyclic number.

It is not a de Polignac number, because 64601671 - 2¹³ = 64593479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64601611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71491 + ... + 72388.

It is an arithmetic number, because the mean of its divisors is an integer number (16186500).

Almost surely, 2^64601671 is an apocalyptic number.

64601671 is a deficient number, since it is larger than the sum of its proper divisors (144329).

64601671 is a wasteful number, since it uses less digits than its factorization.

64601671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144328.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 64601671 is about 8037.5164696565. The cubic root of 64601671 is about 401.2495735997.

Subtracting from 64601671 its reverse (17610646), we obtain a square (46991025 = 6855²).

The spelling of 64601671 in words is "sixty-four million, six hundred one thousand, six hundred seventy-one".