63778641 has 8 divisors (see below), whose sum is σ = 85189920. Its totient is φ = 42443232.

The previous prime is 63778633. The next prime is 63778651. The reversal of 63778641 is 14687736.

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

It is not a de Polignac number, because 63778641 - 2³ = 63778633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63778593 and 63778602.

It is not an unprimeable number, because it can be changed into a prime (63778651) 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, 16975 + ... + 20388.

It is an arithmetic number, because the mean of its divisors is an integer number (10648740).

Almost surely, 2^63778641 is an apocalyptic number.

It is an amenable number.

63778641 is a deficient number, since it is larger than the sum of its proper divisors (21411279).

63778641 is a wasteful number, since it uses less digits than its factorization.

63778641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37935.

The product of its digits is 169344, while the sum is 42.

The square root of 63778641 is about 7986.1530789235. The cubic root of 63778641 is about 399.5383027107.

The spelling of 63778641 in words is "sixty-three million, seven hundred seventy-eight thousand, six hundred forty-one".