64147885 has 24 divisors (see below), whose sum is σ = 82757376. Its totient is φ = 47719680.

The previous prime is 64147883. The next prime is 64147991. The reversal of 64147885 is 58874146.

It is not a de Polignac number, because 64147885 - 2¹ = 64147883 is a prime.

It is a super-2 number, since 2×64147885² = 8229902299946450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64147883) 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, 148620 + ... + 149050.

It is an arithmetic number, because the mean of its divisors is an integer number (3448224).

Almost surely, 2^64147885 is an apocalyptic number.

It is an amenable number.

64147885 is a deficient number, since it is larger than the sum of its proper divisors (18609491).

64147885 is a wasteful number, since it uses less digits than its factorization.

64147885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 556 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 64147885 is about 8009.2374793110. The cubic root of 64147885 is about 400.3078567498.

The spelling of 64147885 in words is "sixty-four million, one hundred forty-seven thousand, eight hundred eighty-five".