64786465 has 4 divisors (see below), whose sum is σ = 77743764. Its totient is φ = 51829168.

The previous prime is 64786457. The next prime is 64786483. The reversal of 64786465 is 56468746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56468746 = 2 ⋅28234373.

It can be written as a sum of positive squares in 2 ways, for example, as 23261329 + 41525136 = 4823^2 + 6444^2 .

It is a cyclic number.

It is not a de Polignac number, because 64786465 - 2³ = 64786457 is a prime.

It is a super-4 number, since 4×64786465⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6478642 + ... + 6478651.

It is an arithmetic number, because the mean of its divisors is an integer number (19435941).

Almost surely, 2^64786465 is an apocalyptic number.

It is an amenable number.

64786465 is a deficient number, since it is larger than the sum of its proper divisors (12957299).

64786465 is a wasteful number, since it uses less digits than its factorization.

64786465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12957298.

The product of its digits is 967680, while the sum is 46.

The square root of 64786465 is about 8049.0039756482. The cubic root of 64786465 is about 401.6318027471.

The spelling of 64786465 in words is "sixty-four million, seven hundred eighty-six thousand, four hundred sixty-five".