121660255764 has 36 divisors (see below), whose sum is σ = 323715887040. Its totient is φ = 38419027920.

The previous prime is 121660255741. The next prime is 121660255789. The reversal of 121660255764 is 467552066121.

121660255764 is a `hidden beast` number, since 1 + 2 + 16 + 60 + 2 + 5 + 576 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88932252 + ... + 88933619.

Almost surely, 2^121660255764 is an apocalyptic number.

It is an amenable number.

121660255764 is an abundant number, since it is smaller than the sum of its proper divisors (202055631276).

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

121660255764 is a wasteful number, since it uses less digits than its factorization.

121660255764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177865900 (or 177865895 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 121660255764 in words is "one hundred twenty-one billion, six hundred sixty million, two hundred fifty-five thousand, seven hundred sixty-four".