64162565 has 4 divisors (see below), whose sum is σ = 76995084. Its totient is φ = 51330048.

The previous prime is 64162543. The next prime is 64162577. The reversal of 64162565 is 56526146.

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 28366276 + 35796289 = 5326^2 + 5983^2 .

It is a cyclic number.

It is not a de Polignac number, because 64162565 - 2¹⁰ = 64161541 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 3 ways as a sum of consecutive naturals, for example, 6416252 + ... + 6416261.

It is an arithmetic number, because the mean of its divisors is an integer number (19248771).

Almost surely, 2^64162565 is an apocalyptic number.

It is an amenable number.

64162565 is a deficient number, since it is larger than the sum of its proper divisors (12832519).

64162565 is a wasteful number, since it uses less digits than its factorization.

64162565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12832518.

The product of its digits is 43200, while the sum is 35.

The square root of 64162565 is about 8010.1538686844. The cubic root of 64162565 is about 400.3383907319.

The spelling of 64162565 in words is "sixty-four million, one hundred sixty-two thousand, five hundred sixty-five".