121765713656 has 8 divisors (see below), whose sum is σ = 228310713120. Its totient is φ = 60882856824.

The previous prime is 121765713617. The next prime is 121765713661. The reversal of 121765713656 is 656317567121.

121765713656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610357096 + ... + 7610357111.

It is an arithmetic number, because the mean of its divisors is an integer number (28538839140).

Almost surely, 2^121765713656 is an apocalyptic number.

It is an amenable number.

121765713656 is a deficient number, since it is larger than the sum of its proper divisors (106544999464).

121765713656 is a wasteful number, since it uses less digits than its factorization.

121765713656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15220714213 (or 15220714209 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 50.

The spelling of 121765713656 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred thirteen thousand, six hundred fifty-six".