121625755761 has 8 divisors (see below), whose sum is σ = 162174437280. Its totient is φ = 81080455712.

The previous prime is 121625755747. The next prime is 121625755781. The reversal of 121625755761 is 167557526121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121625755761 - 2⁹ = 121625755249 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121625755761.

It is not an unprimeable number, because it can be changed into a prime (121625755711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760215 + ... + 906188.

It is an arithmetic number, because the mean of its divisors is an integer number (20271804660).

Almost surely, 2^121625755761 is an apocalyptic number.

It is an amenable number.

121625755761 is a deficient number, since it is larger than the sum of its proper divisors (40548681519).

121625755761 is a wasteful number, since it uses less digits than its factorization.

121625755761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690735.

The product of its digits is 882000, while the sum is 48.

The spelling of 121625755761 in words is "one hundred twenty-one billion, six hundred twenty-five million, seven hundred fifty-five thousand, seven hundred sixty-one".