63677710656 has 672 divisors, whose sum is σ = 225989091328. Its totient is φ = 17400821760.

The previous prime is 63677710651. The next prime is 63677710661. The reversal of 63677710656 is 65601777636.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63677710651) and next prime (63677710661).

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63677710651) 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 95 ways as a sum of consecutive naturals, for example, 285550161 + ... + 285550383.

Almost surely, 2^63677710656 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 63677710656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112994545664).

63677710656 is an abundant number, since it is smaller than the sum of its proper divisors (162311380672).

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

63677710656 is a wasteful number, since it uses less digits than its factorization.

63677710656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The spelling of 63677710656 in words is "sixty-three billion, six hundred seventy-seven million, seven hundred ten thousand, six hundred fifty-six".