64909405 has 8 divisors (see below), whose sum is σ = 84972384. Its totient is φ = 47206800.

The previous prime is 64909387. The next prime is 64909441. The reversal of 64909405 is 50490946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64909405 - 2⁷ = 64909277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590031 + ... + 590140.

It is an arithmetic number, because the mean of its divisors is an integer number (10621548).

Almost surely, 2^64909405 is an apocalyptic number.

It is an amenable number.

64909405 is a deficient number, since it is larger than the sum of its proper divisors (20062979).

64909405 is a wasteful number, since it uses less digits than its factorization.

64909405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180187.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 64909405 is about 8056.6373258327. The cubic root of 64909405 is about 401.8856902119.

It can be divided in two parts, 6 and 4909405, that added together give a triangular number (4909411 = T₃₁₃₃).

The spelling of 64909405 in words is "sixty-four million, nine hundred nine thousand, four hundred five".