2421551111166 has 192 divisors, whose sum is σ = 6055407072000. Its totient is φ = 692583091200.

The previous prime is 2421551111159. The next prime is 2421551111227. The reversal of 2421551111166 is 6611111551242.

2421551111166 is a `hidden beast` number, since 2 + 4 + 21 + 5 + 511 + 1 + 116 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2421551111166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50373510 + ... + 50421558.

It is an arithmetic number, because the mean of its divisors is an integer number (31538578500).

Almost surely, 2^{2421551111166} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2421551111166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3027703536000).

2421551111166 is an abundant number, since it is smaller than the sum of its proper divisors (3633855960834).

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

2421551111166 is a wasteful number, since it uses less digits than its factorization.

2421551111166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48295 (or 48292 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The spelling of 2421551111166 in words is "two trillion, four hundred twenty-one billion, five hundred fifty-one million, one hundred eleven thousand, one hundred sixty-six".