63891156 has 96 divisors (see below), whose sum is σ = 178377472. Its totient is φ = 17418240.

The previous prime is 63891143. The next prime is 63891173. The reversal of 63891156 is 65119836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189420 + ... + 189756.

Almost surely, 2^63891156 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 63891156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89188736).

63891156 is an abundant number, since it is smaller than the sum of its proper divisors (114486316).

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

63891156 is a wasteful number, since it uses less digits than its factorization.

63891156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 63891156 is about 7993.1943551999. The cubic root of 63891156 is about 399.7731129967.

The spelling of 63891156 in words is "sixty-three million, eight hundred ninety-one thousand, one hundred fifty-six".