64540305 has 12 divisors (see below), whose sum is σ = 111869940. Its totient is φ = 34421472.

The previous prime is 64540271. The next prime is 64540319. The reversal of 64540305 is 50304546.

It can be written as a sum of positive squares in 2 ways, for example, as 7568001 + 56972304 = 2751^2 + 7548^2 .

It is not a de Polignac number, because 64540305 - 2¹⁶ = 64474769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717070 + ... + 717159.

It is an arithmetic number, because the mean of its divisors is an integer number (9322495).

Almost surely, 2^64540305 is an apocalyptic number.

It is an amenable number.

64540305 is a deficient number, since it is larger than the sum of its proper divisors (47329635).

64540305 is a wasteful number, since it uses less digits than its factorization.

64540305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434240 (or 1434237 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 64540305 is about 8033.6980899210. The cubic root of 64540305 is about 401.1224825525.

The spelling of 64540305 in words is "sixty-four million, five hundred forty thousand, three hundred five".