64671845 has 8 divisors (see below), whose sum is σ = 88692864. Its totient is φ = 44346384.

The previous prime is 64671823. The next prime is 64671851. The reversal of 64671845 is 54817646.

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 64671845 - 2⁶ = 64671781 is a prime.

It is a Duffinian number.

It is a congruent 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, 923849 + ... + 923918.

It is an arithmetic number, because the mean of its divisors is an integer number (11086608).

Almost surely, 2^64671845 is an apocalyptic number.

It is an amenable number.

64671845 is a deficient number, since it is larger than the sum of its proper divisors (24021019).

64671845 is a wasteful number, since it uses less digits than its factorization.

64671845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847779.

The product of its digits is 161280, while the sum is 41.

The square root of 64671845 is about 8041.8806879983. The cubic root of 64671845 is about 401.3948077087.

The spelling of 64671845 in words is "sixty-four million, six hundred seventy-one thousand, eight hundred forty-five".