63768257 has 6 divisors (see below), whose sum is σ = 74179458. Its totient is φ = 54658464.

The previous prime is 63768217. The next prime is 63768277. The reversal of 63768257 is 75286736.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 5764801 = 7616^2 + 2401^2 .

It is not a de Polignac number, because 63768257 - 2¹⁰ = 63767233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63768217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 650648 + ... + 650745.

It is an arithmetic number, because the mean of its divisors is an integer number (12363243).

Almost surely, 2^63768257 is an apocalyptic number.

It is an amenable number.

63768257 is a deficient number, since it is larger than the sum of its proper divisors (10411201).

63768257 is a wasteful number, since it uses less digits than its factorization.

63768257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301407 (or 1301400 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The square root of 63768257 is about 7985.5029271800. The cubic root of 63768257 is about 399.5166181737.

The spelling of 63768257 in words is "sixty-three million, seven hundred sixty-eight thousand, two hundred fifty-seven".