63257643 has 6 divisors (see below), whose sum is σ = 91372164. Its totient is φ = 42171756.

The previous prime is 63257641. The next prime is 63257647. The reversal of 63257643 is 34675236.

63257643 is a `hidden beast` number, since 6 + 3 + 2 + 5 + 7 + 643 = 666.

It is not a de Polignac number, because 63257643 - 2¹ = 63257641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63257598 and 63257607.

It is not an unprimeable number, because it can be changed into a prime (63257641) 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, 3514305 + ... + 3514322.

It is an arithmetic number, because the mean of its divisors is an integer number (15228694).

Almost surely, 2^63257643 is an apocalyptic number.

63257643 is a deficient number, since it is larger than the sum of its proper divisors (28114521).

63257643 is a wasteful number, since it uses less digits than its factorization.

63257643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028633 (or 7028630 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 63257643 is about 7953.4673570714. The cubic root of 63257643 is about 398.4474043305.

The spelling of 63257643 in words is "sixty-three million, two hundred fifty-seven thousand, six hundred forty-three".