64782405 has 24 divisors (see below), whose sum is σ = 115914240. Its totient is φ = 33435360.

The previous prime is 64782397. The next prime is 64782407. The reversal of 64782405 is 50428746.

64782405 is a `hidden beast` number, since 647 + 8 + 2 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 64782405 - 2³ = 64782397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64782405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64782407) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 21825 + ... + 24614.

It is an arithmetic number, because the mean of its divisors is an integer number (4829760).

Almost surely, 2^64782405 is an apocalyptic number.

It is an amenable number.

64782405 is a deficient number, since it is larger than the sum of its proper divisors (51131835).

64782405 is a wasteful number, since it uses less digits than its factorization.

64782405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46481 (or 46478 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 64782405 is about 8048.7517665785. The cubic root of 64782405 is about 401.6234128302.

The spelling of 64782405 in words is "sixty-four million, seven hundred eighty-two thousand, four hundred five".