64957565 has 4 divisors (see below), whose sum is σ = 77949084. Its totient is φ = 51966048.

The previous prime is 64957559. The next prime is 64957573. The reversal of 64957565 is 56575946.

It is a happy number.

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 37100281 + 27857284 = 6091^2 + 5278^2 .

It is a cyclic number.

It is not a de Polignac number, because 64957565 - 2⁴ = 64957549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6495752 + ... + 6495761.

It is an arithmetic number, because the mean of its divisors is an integer number (19487271).

Almost surely, 2^64957565 is an apocalyptic number.

It is an amenable number.

64957565 is a deficient number, since it is larger than the sum of its proper divisors (12991519).

64957565 is a wasteful number, since it uses less digits than its factorization.

64957565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991518.

The product of its digits is 1134000, while the sum is 47.

The square root of 64957565 is about 8059.6256116522. The cubic root of 64957565 is about 401.9850596330.

The spelling of 64957565 in words is "sixty-four million, nine hundred fifty-seven thousand, five hundred sixty-five".