64645634 has 8 divisors (see below), whose sum is σ = 97005180. Its totient is φ = 32310576.

The previous prime is 64645631. The next prime is 64645639. The reversal of 64645634 is 43654646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46963609 + 17682025 = 6853^2 + 4205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64645631) 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, 3512 + ... + 11900.

Almost surely, 2^64645634 is an apocalyptic number.

64645634 is a deficient number, since it is larger than the sum of its proper divisors (32359546).

64645634 is a wasteful number, since it uses less digits than its factorization.

64645634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244.

The product of its digits is 207360, while the sum is 38.

The square root of 64645634 is about 8040.2508667330. The cubic root of 64645634 is about 401.3405729744.

The spelling of 64645634 in words is "sixty-four million, six hundred forty-five thousand, six hundred thirty-four".