64651873 has 24 divisors (see below), whose sum is σ = 79902144. Its totient is φ = 51865440.

The previous prime is 64651871. The next prime is 64651883. The reversal of 64651873 is 37815646.

It is a happy number.

It is not a de Polignac number, because 64651873 - 2¹ = 64651871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64651871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35286 + ... + 37072.

It is an arithmetic number, because the mean of its divisors is an integer number (3329256).

Almost surely, 2^64651873 is an apocalyptic number.

It is an amenable number.

64651873 is a deficient number, since it is larger than the sum of its proper divisors (15250271).

64651873 is a wasteful number, since it uses less digits than its factorization.

64651873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1834 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 64651873 is about 8040.6388427786. The cubic root of 64651873 is about 401.3534837885.

It can be divided in two parts, 6465 and 1873, that added together give a palindrome (8338).

The spelling of 64651873 in words is "sixty-four million, six hundred fifty-one thousand, eight hundred seventy-three".