63768621 has 8 divisors (see below), whose sum is σ = 97171264. Its totient is φ = 36439200.

The previous prime is 63768619. The next prime is 63768629. The reversal of 63768621 is 12686736.

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

It is not a de Polignac number, because 63768621 - 2¹ = 63768619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63768621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63768629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1518280 + ... + 1518321.

It is an arithmetic number, because the mean of its divisors is an integer number (12146408).

Almost surely, 2^63768621 is an apocalyptic number.

It is an amenable number.

63768621 is a deficient number, since it is larger than the sum of its proper divisors (33402643).

63768621 is a wasteful number, since it uses less digits than its factorization.

63768621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036611.

The product of its digits is 72576, while the sum is 39.

The square root of 63768621 is about 7985.5257184483. The cubic root of 63768621 is about 399.5173783417.

The spelling of 63768621 in words is "sixty-three million, seven hundred sixty-eight thousand, six hundred twenty-one".