63606857616 has 45 divisors (see below), whose sum is σ = 178019328721. Its totient is φ = 21201277056.

The previous prime is 63606857599. The next prime is 63606857653. The reversal of 63606857616 is 61675860636.

The square root of 63606857616 is 252204.

It is a perfect power (a square), and thus also a powerful number.

63606857616 is a `hidden beast` number, since 6 + 3 + 6 + 0 + 68 + 576 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54464400 + 63552393216 = 7380^2 + 252096^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3015940 + ... + 3036956.

Almost surely, 2^63606857616 is an apocalyptic number.

63606857616 is the 252204-th square number.

It is an amenable number.

63606857616 is an abundant number, since it is smaller than the sum of its proper divisors (114412471105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63606857616 is an frugal number, since it uses more digits than its factorization.

63606857616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42048 (or 21022 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 63606857616 in words is "sixty-three billion, six hundred six million, eight hundred fifty-seven thousand, six hundred sixteen".