63957651 has 8 divisors (see below), whose sum is σ = 85315584. Its totient is φ = 42619080.

The previous prime is 63957637. The next prime is 63957659. The reversal of 63957651 is 15675936.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63957651 - 2¹⁷ = 63826579 is a prime.

It is a super-2 number, since 2×63957651² = 8181162242875602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63957659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7030 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (10664448).

Almost surely, 2^63957651 is an apocalyptic number.

63957651 is a deficient number, since it is larger than the sum of its proper divisors (21357933).

63957651 is a wasteful number, since it uses less digits than its factorization.

63957651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681.

The product of its digits is 170100, while the sum is 42.

The square root of 63957651 is about 7997.3527495041. The cubic root of 63957651 is about 399.9117534495.

The spelling of 63957651 in words is "sixty-three million, nine hundred fifty-seven thousand, six hundred fifty-one".