63980649 has 12 divisors (see below), whose sum is σ = 92575236. Its totient is φ = 42580512.

The previous prime is 63980647. The next prime is 63980671. The reversal of 63980649 is 94608936.

63980649 is a `hidden beast` number, since 639 + 8 + 0 + 6 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22610025 + 41370624 = 4755^2 + 6432^2 .

It is not a de Polignac number, because 63980649 - 2¹ = 63980647 is a prime.

It is a super-2 number, since 2×63980649² = 8187046892922402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63980647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (7714603).

Almost surely, 2^63980649 is an apocalyptic number.

It is an amenable number.

63980649 is a deficient number, since it is larger than the sum of its proper divisors (28594587).

63980649 is a wasteful number, since it uses less digits than its factorization.

63980649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216 (or 12213 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 63980649 is about 7998.7904710650. The cubic root of 63980649 is about 399.9596813528.

The spelling of 63980649 in words is "sixty-three million, nine hundred eighty thousand, six hundred forty-nine".