863952956636 has 96 divisors (see below), whose sum is σ = 1987217971200. Its totient is φ = 318403673280.

The previous prime is 863952956563. The next prime is 863952956639. The reversal of 863952956636 is 636659259368.

It is a super-2 number, since 2×863952956636² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863952956639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3744455 + ... + 3968481.

It is an arithmetic number, because the mean of its divisors is an integer number (20700187200).

Almost surely, 2^863952956636 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 863952956636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993608985600).

863952956636 is an abundant number, since it is smaller than the sum of its proper divisors (1123265014564).

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

863952956636 is a wasteful number, since it uses less digits than its factorization.

863952956636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224727 (or 224725 counting only the distinct ones).

The product of its digits is 377913600, while the sum is 68.

The spelling of 863952956636 in words is "eight hundred sixty-three billion, nine hundred fifty-two million, nine hundred fifty-six thousand, six hundred thirty-six".