11315989956 has 48 divisors (see below), whose sum is σ = 28023770880. Its totient is φ = 3541655040.

The previous prime is 11315989897. The next prime is 11315989957. The reversal of 11315989956 is 65998951311.

It is a junction number, because it is equal to n+sod(n) for n = 11315989896 and 11315989905.

It is not an unprimeable number, because it can be changed into a prime (11315989957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20005 + ... + 151763.

It is an arithmetic number, because the mean of its divisors is an integer number (583828560).

Almost surely, 2^11315989956 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 11315989956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14011885440).

11315989956 is an abundant number, since it is smaller than the sum of its proper divisors (16707780924).

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

11315989956 is a wasteful number, since it uses less digits than its factorization.

11315989956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132204 (or 132202 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 57.

The spelling of 11315989956 in words is "eleven billion, three hundred fifteen million, nine hundred eighty-nine thousand, nine hundred fifty-six".