64196905 has 4 divisors (see below), whose sum is σ = 77036292. Its totient is φ = 51357520.

The previous prime is 64196861. The next prime is 64196911. The reversal of 64196905 is 50969146.

64196905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22581504 + 41615401 = 4752^2 + 6451^2 .

It is not a de Polignac number, because 64196905 - 2¹¹ = 64194857 is a prime.

It is a super-2 number, since 2×64196905² = 8242485223158050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6419686 + ... + 6419695.

It is an arithmetic number, because the mean of its divisors is an integer number (19259073).

Almost surely, 2^64196905 is an apocalyptic number.

It is an amenable number.

64196905 is a deficient number, since it is larger than the sum of its proper divisors (12839387).

64196905 is a wasteful number, since it uses less digits than its factorization.

64196905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12839386.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 64196905 is about 8012.2971113158. The cubic root of 64196905 is about 400.4097987690.

The spelling of 64196905 in words is "sixty-four million, one hundred ninety-six thousand, nine hundred five".