64604642 has 4 divisors (see below), whose sum is σ = 96906966. Its totient is φ = 32302320.

The previous prime is 64604623. The next prime is 64604647. The reversal of 64604642 is 24640646.

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

It can be written as a sum of positive squares in only one way, i.e., 57320041 + 7284601 = 7571^2 + 2699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64604599 and 64604608.

It is not an unprimeable number, because it can be changed into a prime (64604647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16151159 + ... + 16151162.

Almost surely, 2^64604642 is an apocalyptic number.

64604642 is a deficient number, since it is larger than the sum of its proper divisors (32302324).

64604642 is a wasteful number, since it uses less digits than its factorization.

64604642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32302323.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 64604642 is about 8037.7012883038. The cubic root of 64604642 is about 401.2557245975.

The spelling of 64604642 in words is "sixty-four million, six hundred four thousand, six hundred forty-two".