63521606 has 8 divisors (see below), whose sum is σ = 95358504. Its totient is φ = 31735440.

The previous prime is 63521599. The next prime is 63521663. The reversal of 63521606 is 60612536.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9380 + ... + 14663.

It is an arithmetic number, because the mean of its divisors is an integer number (11919813).

Almost surely, 2^63521606 is an apocalyptic number.

63521606 is a deficient number, since it is larger than the sum of its proper divisors (31836898).

63521606 is a wasteful number, since it uses less digits than its factorization.

63521606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25366.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 63521606 is about 7970.0442909685. The cubic root of 63521606 is about 399.0008521704. Note that the first 3 decimals are identical.

The spelling of 63521606 in words is "sixty-three million, five hundred twenty-one thousand, six hundred six".