64630553 has 8 divisors (see below), whose sum is σ = 70135296. Its totient is φ = 59202000.

The previous prime is 64630541. The next prime is 64630603. The reversal of 64630553 is 35503646.

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

It is a de Polignac number, because none of the positive numbers 2^k-64630553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64635553) 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, 17273 + ... + 20678.

It is an arithmetic number, because the mean of its divisors is an integer number (8766912).

Almost surely, 2^64630553 is an apocalyptic number.

It is an amenable number.

64630553 is a deficient number, since it is larger than the sum of its proper divisors (5504743).

64630553 is a wasteful number, since it uses less digits than its factorization.

64630553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38095.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 64630553 is about 8039.3129681584. The cubic root of 64630553 is about 401.3093613389.

The spelling of 64630553 in words is "sixty-four million, six hundred thirty thousand, five hundred fifty-three".