64749577 has 8 divisors (see below), whose sum is σ = 67682880. Its totient is φ = 61826160.

The previous prime is 64749571. The next prime is 64749649. The reversal of 64749577 is 77594746.

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 64749577 - 2³ = 64749569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64749577.

It is not an unprimeable number, because it can be changed into a prime (64749571) 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, 13074 + ... + 17332.

It is an arithmetic number, because the mean of its divisors is an integer number (8460360).

Almost surely, 2^64749577 is an apocalyptic number.

It is an amenable number.

64749577 is a deficient number, since it is larger than the sum of its proper divisors (2933303).

64749577 is a wasteful number, since it uses less digits than its factorization.

64749577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its digits is 1481760, while the sum is 49.

The square root of 64749577 is about 8046.7121857315. The cubic root of 64749577 is about 401.5555614793. Note that the first 4 decimals are identical.

The spelling of 64749577 in words is "sixty-four million, seven hundred forty-nine thousand, five hundred seventy-seven".