64632305 has 4 divisors (see below), whose sum is σ = 77558772. Its totient is φ = 51705840.

The previous prime is 64632301. The next prime is 64632343. The reversal of 64632305 is 50323646.

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 15618304 + 49014001 = 3952^2 + 7001^2 .

It is not a de Polignac number, because 64632305 - 2² = 64632301 is a prime.

It is a super-2 number, since 2×64632305² = 8354669699226050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64632301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6463226 + ... + 6463235.

It is an arithmetic number, because the mean of its divisors is an integer number (19389693).

Almost surely, 2^64632305 is an apocalyptic number.

It is an amenable number.

64632305 is a deficient number, since it is larger than the sum of its proper divisors (12926467).

64632305 is a wasteful number, since it uses less digits than its factorization.

64632305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926466.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 64632305 is about 8039.4219319551. The cubic root of 64632305 is about 401.3129875271.

It can be divided in two parts, 646 and 32305, that multiplied together give a triangular number (20869030 = T₆₄₆₀).

The spelling of 64632305 in words is "sixty-four million, six hundred thirty-two thousand, three hundred five".