121765754616 has 128 divisors (see below), whose sum is σ = 351974937600. Its totient is φ = 34693447680.

The previous prime is 121765754611. The next prime is 121765754653. The reversal of 121765754616 is 616457567121.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121765754611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4649976 + ... + 4676088.

It is an arithmetic number, because the mean of its divisors is an integer number (2749804200).

Almost surely, 2^121765754616 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 121765754616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175987468800).

121765754616 is an abundant number, since it is smaller than the sum of its proper divisors (230209182984).

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

121765754616 is a wasteful number, since it uses less digits than its factorization.

121765754616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27189 (or 27185 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The spelling of 121765754616 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred fifty-four thousand, six hundred sixteen".