63257656 has 64 divisors (see below), whose sum is σ = 149460480. Its totient is φ = 24382080.

The previous prime is 63257653. The next prime is 63257683. The reversal of 63257656 is 65675236.

63257656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63257656² = 8003062085228672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63257653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62950 + ... + 63946.

It is an arithmetic number, because the mean of its divisors is an integer number (2335320).

Almost surely, 2^63257656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63257656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74730240).

63257656 is an abundant number, since it is smaller than the sum of its proper divisors (86202824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63257656 is a wasteful number, since it uses less digits than its factorization.

63257656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1120 counting only the distinct ones).

The product of its digits is 226800, while the sum is 40.

The square root of 63257656 is about 7953.4681743250. The cubic root of 63257656 is about 398.4474316253.

The spelling of 63257656 in words is "sixty-three million, two hundred fifty-seven thousand, six hundred fifty-six".