64746145 has 4 divisors (see below), whose sum is σ = 77695380. Its totient is φ = 51796912.

The previous prime is 64746139. The next prime is 64746161. The reversal of 64746145 is 54164746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54164746 = 2 ⋅27082373.

It can be written as a sum of positive squares in 2 ways, for example, as 37246609 + 27499536 = 6103^2 + 5244^2 .

It is a cyclic number.

It is not a de Polignac number, because 64746145 - 2³ = 64746137 is a prime.

It is a super-2 number, since 2×64746145² = 8384126584722050, which contains 22 as substring.

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, 6474610 + ... + 6474619.

It is an arithmetic number, because the mean of its divisors is an integer number (19423845).

Almost surely, 2^64746145 is an apocalyptic number.

It is an amenable number.

64746145 is a deficient number, since it is larger than the sum of its proper divisors (12949235).

64746145 is a wasteful number, since it uses less digits than its factorization.

64746145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12949234.

The product of its digits is 80640, while the sum is 37.

The square root of 64746145 is about 8046.4989281053. The cubic root of 64746145 is about 401.5484666426.

The spelling of 64746145 in words is "sixty-four million, seven hundred forty-six thousand, one hundred forty-five".