121766648784 has 160 divisors (see below), whose sum is σ = 349072657920. Its totient is φ = 36268608000.

The previous prime is 121766648779. The next prime is 121766648797. The reversal of 121766648784 is 487846667121.

It is a congruent 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, 7404379 + ... + 7420805.

It is an arithmetic number, because the mean of its divisors is an integer number (2181704112).

Almost surely, 2^121766648784 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 121766648784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174536328960).

121766648784 is an abundant number, since it is smaller than the sum of its proper divisors (227306009136).

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

121766648784 is a wasteful number, since it uses less digits than its factorization.

121766648784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16689 (or 16683 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 60.

The spelling of 121766648784 in words is "one hundred twenty-one billion, seven hundred sixty-six million, six hundred forty-eight thousand, seven hundred eighty-four".