64540145 has 8 divisors (see below), whose sum is σ = 77500800. Its totient is φ = 51597040.

The previous prime is 64540141. The next prime is 64540181. The reversal of 64540145 is 54104546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64540145 - 2² = 64540141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64540141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5906 + ... + 12804.

It is an arithmetic number, because the mean of its divisors is an integer number (9687600).

Almost surely, 2^64540145 is an apocalyptic number.

It is an amenable number.

64540145 is a deficient number, since it is larger than the sum of its proper divisors (12960655).

64540145 is a wasteful number, since it uses less digits than its factorization.

64540145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 64540145 is about 8033.6881318607. The cubic root of 64540145 is about 401.1221510819.

The spelling of 64540145 in words is "sixty-four million, five hundred forty thousand, one hundred forty-five".