11159431976 has 128 divisors (see below), whose sum is σ = 26390016000. Its totient is φ = 4297708800.

The previous prime is 11159431957. The next prime is 11159431991. The reversal of 11159431976 is 67913495111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11159431976.

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, 33714131 + ... + 33714461.

It is an arithmetic number, because the mean of its divisors is an integer number (206172000).

Almost surely, 2^11159431976 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 11159431976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13195008000).

11159431976 is an abundant number, since it is smaller than the sum of its proper divisors (15230584024).

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

11159431976 is a wasteful number, since it uses less digits than its factorization.

11159431976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 819 counting only the distinct ones).

The product of its digits is 204120, while the sum is 47.

The spelling of 11159431976 in words is "eleven billion, one hundred fifty-nine million, four hundred thirty-one thousand, nine hundred seventy-six".