1963648856 has 96 divisors (see below), whose sum is σ = 4110912000. Its totient is φ = 878596992.

The previous prime is 1963648823. The next prime is 1963648859. The reversal of 1963648856 is 6588463691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963648859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8215985 + ... + 8216223.

It is an arithmetic number, because the mean of its divisors is an integer number (42822000).

Almost surely, 2^1963648856 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 1963648856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2055456000).

1963648856 is an abundant number, since it is smaller than the sum of its proper divisors (2147263144).

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

1963648856 is a wasteful number, since it uses less digits than its factorization.

1963648856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 416 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The square root of 1963648856 is about 44313.0777085050. The cubic root of 1963648856 is about 1252.2410689667.

The spelling of 1963648856 in words is "one billion, nine hundred sixty-three million, six hundred forty-eight thousand, eight hundred fifty-six".