64761616 has 10 divisors (see below), whose sum is σ = 125475662. Its totient is φ = 32380800.

The previous prime is 64761547. The next prime is 64761617. The reversal of 64761616 is 61616746.

64761616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 5779216 = 7680^2 + 2404^2 .

It is not an unprimeable number, because it can be changed into a prime (64761617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2023785 + ... + 2023816.

Almost surely, 2^64761616 is an apocalyptic number.

It is an amenable number.

64761616 is a deficient number, since it is larger than the sum of its proper divisors (60714046).

64761616 is a wasteful number, since it uses less digits than its factorization.

64761616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047609 (or 4047603 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 64761616 is about 8047.4602204671. The cubic root of 64761616 is about 401.5804472420.

The spelling of 64761616 in words is "sixty-four million, seven hundred sixty-one thousand, six hundred sixteen".