64655245 has 4 divisors (see below), whose sum is σ = 77586300. Its totient is φ = 51724192.

The previous prime is 64655197. The next prime is 64655249. The reversal of 64655245 is 54255646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29833444 + 34821801 = 5462^2 + 5901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64655245 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64655249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6465520 + ... + 6465529.

It is an arithmetic number, because the mean of its divisors is an integer number (19396575).

Almost surely, 2^64655245 is an apocalyptic number.

It is an amenable number.

64655245 is a deficient number, since it is larger than the sum of its proper divisors (12931055).

64655245 is a wasteful number, since it uses less digits than its factorization.

64655245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931054.

The product of its digits is 144000, while the sum is 37.

The square root of 64655245 is about 8040.8485248760. The cubic root of 64655245 is about 401.3604613663.

The spelling of 64655245 in words is "sixty-four million, six hundred fifty-five thousand, two hundred forty-five".