64985871 has 8 divisors (see below), whose sum is σ = 91208320. Its totient is φ = 41043672.

The previous prime is 64985867. The next prime is 64985873. The reversal of 64985871 is 17858946.

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

It is not a de Polignac number, because 64985871 - 2² = 64985867 is a prime.

It is a super-3 number, since 3×64985871³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64985871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64985873) 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, 569995 + ... + 570108.

It is an arithmetic number, because the mean of its divisors is an integer number (11401040).

Almost surely, 2^64985871 is an apocalyptic number.

64985871 is a deficient number, since it is larger than the sum of its proper divisors (26222449).

64985871 is a wasteful number, since it uses less digits than its factorization.

64985871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140125.

The product of its digits is 483840, while the sum is 48.

The square root of 64985871 is about 8061.3814572938. The cubic root of 64985871 is about 402.0434410123.

It can be divided in two parts, 64985 and 871, that added together give a palindrome (65856).

The spelling of 64985871 in words is "sixty-four million, nine hundred eighty-five thousand, eight hundred seventy-one".