121964768439 has 16 divisors (see below), whose sum is σ = 167908715520. Its totient is φ = 78666684480.

The previous prime is 121964768417. The next prime is 121964768447. The reversal of 121964768439 is 934867469121.

It is not a de Polignac number, because 121964768439 - 2⁵ = 121964768407 is a prime.

It is a super-4 number, since 4×121964768439⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121964768239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198504 + ... + 532290.

It is an arithmetic number, because the mean of its divisors is an integer number (10494294720).

Almost surely, 2^121964768439 is an apocalyptic number.

121964768439 is a deficient number, since it is larger than the sum of its proper divisors (45943947081).

121964768439 is a wasteful number, since it uses less digits than its factorization.

121964768439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337750.

The product of its digits is 15676416, while the sum is 60.

The spelling of 121964768439 in words is "one hundred twenty-one billion, nine hundred sixty-four million, seven hundred sixty-eight thousand, four hundred thirty-nine".