11195956856 has 64 divisors (see below), whose sum is σ = 24837857280. Its totient is φ = 4631765760.

The previous prime is 11195956847. The next prime is 11195956921. The reversal of 11195956856 is 65865959111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163001 + ... + 221271.

It is an arithmetic number, because the mean of its divisors is an integer number (388091520).

Almost surely, 2^11195956856 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 11195956856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12418928640).

11195956856 is an abundant number, since it is smaller than the sum of its proper divisors (13641900424).

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

11195956856 is a wasteful number, since it uses less digits than its factorization.

11195956856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58404 (or 58400 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 56.

The spelling of 11195956856 in words is "eleven billion, one hundred ninety-five million, nine hundred fifty-six thousand, eight hundred fifty-six".