64548657 has 20 divisors (see below), whose sum is σ = 96947620. Its totient is φ = 42799104.

The previous prime is 64548619. The next prime is 64548661. The reversal of 64548657 is 75684546.

It can be written as a sum of positive squares in 2 ways, for example, as 25310961 + 39237696 = 5031^2 + 6264^2 .

It is not a de Polignac number, because 64548657 - 2¹⁰ = 64547633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64548607) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13569 + ... + 17697.

It is an arithmetic number, because the mean of its divisors is an integer number (4847381).

Almost surely, 2^64548657 is an apocalyptic number.

It is an amenable number.

64548657 is a deficient number, since it is larger than the sum of its proper divisors (32398963).

64548657 is a wasteful number, since it uses less digits than its factorization.

64548657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334 (or 4325 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 64548657 is about 8034.2178835279. The cubic root of 64548657 is about 401.1397845598.

The spelling of 64548657 in words is "sixty-four million, five hundred forty-eight thousand, six hundred fifty-seven".