11855997846 has 144 divisors (see below), whose sum is σ = 34022476800. Its totient is φ = 2898236160.

The previous prime is 11855997827. The next prime is 11855997871. The reversal of 11855997846 is 64879955811.

11855997846 is a `hidden beast` number, since 1 + 1 + 8 + 559 + 9 + 78 + 4 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 385755 + ... + 415353.

It is an arithmetic number, because the mean of its divisors is an integer number (236267200).

Almost surely, 2^11855997846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11855997846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17011238400).

11855997846 is an abundant number, since it is smaller than the sum of its proper divisors (22166478954).

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

11855997846 is a wasteful number, since it uses less digits than its factorization.

11855997846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29659 (or 29639 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 63.

The spelling of 11855997846 in words is "eleven billion, eight hundred fifty-five million, nine hundred ninety-seven thousand, eight hundred forty-six".