63616745 has 4 divisors (see below), whose sum is σ = 76340100. Its totient is φ = 50893392.

The previous prime is 63616741. The next prime is 63616747. The reversal of 63616745 is 54761636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 40615129 = 4796^2 + 6373^2 .

It is a cyclic number.

It is not a de Polignac number, because 63616745 - 2² = 63616741 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 63616699 and 63616708.

It is not an unprimeable number, because it can be changed into a prime (63616741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6361670 + ... + 6361679.

It is an arithmetic number, because the mean of its divisors is an integer number (19085025).

Almost surely, 2^63616745 is an apocalyptic number.

It is an amenable number.

63616745 is a deficient number, since it is larger than the sum of its proper divisors (12723355).

63616745 is a wasteful number, since it uses less digits than its factorization.

63616745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12723354.

The product of its digits is 90720, while the sum is 38.

The square root of 63616745 is about 7976.0105942758. The cubic root of 63616745 is about 399.1999529620.

The spelling of 63616745 in words is "sixty-three million, six hundred sixteen thousand, seven hundred forty-five".