11956158120 has 128 divisors (see below), whose sum is σ = 38974464000. Its totient is φ = 2923050240.

The previous prime is 11956158113. The next prime is 11956158131. The reversal of 11956158120 is 2185165911.

It is a happy number.

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, 13900 + ... + 155259.

It is an arithmetic number, because the mean of its divisors is an integer number (304488000).

Almost surely, 2^11956158120 is an apocalyptic number.

11956158120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11956158120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19487232000).

11956158120 is an abundant number, since it is smaller than the sum of its proper divisors (27018305880).

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

11956158120 is a wasteful number, since it uses less digits than its factorization.

11956158120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169223 (or 169219 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 11956158120 in words is "eleven billion, nine hundred fifty-six million, one hundred fifty-eight thousand, one hundred twenty".