64681545 has 8 divisors (see below), whose sum is σ = 103490496. Its totient is φ = 34496816.

The previous prime is 64681501. The next prime is 64681553. The reversal of 64681545 is 54518646.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64681545 - 2¹⁵ = 64648777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156037 + ... + 2156066.

It is an arithmetic number, because the mean of its divisors is an integer number (12936312).

Almost surely, 2^64681545 is an apocalyptic number.

It is an amenable number.

64681545 is a deficient number, since it is larger than the sum of its proper divisors (38808951).

64681545 is a wasteful number, since it uses less digits than its factorization.

64681545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312111.

The product of its digits is 115200, while the sum is 39.

The square root of 64681545 is about 8042.4837581434. The cubic root of 64681545 is about 401.4148748388.

The spelling of 64681545 in words is "sixty-four million, six hundred eighty-one thousand, five hundred forty-five".