64195812 has 36 divisors (see below), whose sum is σ = 162593340. Its totient is φ = 21356352.

The previous prime is 64195793. The next prime is 64195819. The reversal of 64195812 is 21859146.

64195812 is a `hidden beast` number, since 64 + 19 + 581 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 42068196 = 4704^2 + 6486^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64195812² = 8242204556678688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64195819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20614 + ... + 23522.

Almost surely, 2^64195812 is an apocalyptic number.

It is an amenable number.

64195812 is an abundant number, since it is smaller than the sum of its proper divisors (98397528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64195812 is a wasteful number, since it uses less digits than its factorization.

64195812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532 (or 3527 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 64195812 is about 8012.2289033701. The cubic root of 64195812 is about 400.4075263314.

The spelling of 64195812 in words is "sixty-four million, one hundred ninety-five thousand, eight hundred twelve".