63698188225 has 27 divisors (see below), whose sum is σ = 91894130211. Its totient is φ = 43672700400.

The previous prime is 63698188217. The next prime is 63698188243. The reversal of 63698188225 is 52288189636.

The square root of 63698188225 is 252385.

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

It can be written as a sum of positive squares in only one way, i.e., 22931347761 + 40766840464 = 151431^2 + 201908^2 .

It is not a de Polignac number, because 63698188225 - 2³ = 63698188217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63698188225.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8829870 + ... + 8837080.

Almost surely, 2^63698188225 is an apocalyptic number.

63698188225 is the 252385-th square number.

63698188225 is the 126193-rd centered octagonal number.

It is an amenable number.

63698188225 is a deficient number, since it is larger than the sum of its proper divisors (28195941986).

63698188225 is an frugal number, since it uses more digits than its factorization.

63698188225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14446 (or 7223 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 58.

The spelling of 63698188225 in words is "sixty-three billion, six hundred ninety-eight million, one hundred eighty-eight thousand, two hundred twenty-five".