64999545 has 16 divisors (see below), whose sum is σ = 111999552. Its totient is φ = 31999680.

The previous prime is 64999537. The next prime is 64999547. The reversal of 64999545 is 54599946.

It is not a de Polignac number, because 64999545 - 2³ = 64999537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64999547) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 166471 + ... + 166860.

It is an arithmetic number, because the mean of its divisors is an integer number (6999972).

Almost surely, 2^64999545 is an apocalyptic number.

64999545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64999545 is a deficient number, since it is larger than the sum of its proper divisors (47000007).

64999545 is a wasteful number, since it uses less digits than its factorization.

64999545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333352.

The product of its digits is 1749600, while the sum is 51.

The square root of 64999545 is about 8062.2295303470. The cubic root of 64999545 is about 402.0716376874.

The spelling of 64999545 in words is "sixty-four million, nine hundred ninety-nine thousand, five hundred forty-five".