63861696 has 140 divisors (see below), whose sum is σ = 192763648. Its totient is φ = 20901888.

The previous prime is 63861691. The next prime is 63861697. The reversal of 63861696 is 69616836.

63861696 is a `hidden beast` number, since 638 + 6 + 1 + 6 + 9 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63861691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 502785 + ... + 502911.

Almost surely, 2^63861696 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 63861696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96381824).

63861696 is an abundant number, since it is smaller than the sum of its proper divisors (128901952).

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

63861696 is a wasteful number, since it uses less digits than its factorization.

63861696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 229 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 63861696 is about 7991.3513250263. The cubic root of 63861696 is about 399.7116588651.

The spelling of 63861696 in words is "sixty-three million, eight hundred sixty-one thousand, six hundred ninety-six".