64545655 has 4 divisors (see below), whose sum is σ = 77454792. Its totient is φ = 51636520.

The previous prime is 64545631. The next prime is 64545673. The reversal of 64545655 is 55654546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55654546 = 2 ⋅27827273.

It is not a de Polignac number, because 64545655 - 2¹⁷ = 64414583 is a prime.

It is a super-2 number, since 2×64545655² = 8332283158758050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6454561 + ... + 6454570.

It is an arithmetic number, because the mean of its divisors is an integer number (19363698).

Almost surely, 2^64545655 is an apocalyptic number.

64545655 is a deficient number, since it is larger than the sum of its proper divisors (12909137).

64545655 is a wasteful number, since it uses less digits than its factorization.

64545655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12909136.

The product of its digits is 360000, while the sum is 40.

The square root of 64545655 is about 8034.0310554540. The cubic root of 64545655 is about 401.1335657869.

The spelling of 64545655 in words is "sixty-four million, five hundred forty-five thousand, six hundred fifty-five".