64121205983 has 8 divisors (see below), whose sum is σ = 67015136256. Its totient is φ = 61236113400.

The previous prime is 64121205917. The next prime is 64121206027. The reversal of 64121205983 is 38950212146.

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 64121205983 - 2²⁶ = 64054097119 is a prime.

It is a super-2 number, since 2×64121205983² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64121205983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121205913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2194583 + ... + 2223608.

It is an arithmetic number, because the mean of its divisors is an integer number (8376892032).

Almost surely, 2^64121205983 is an apocalyptic number.

64121205983 is a deficient number, since it is larger than the sum of its proper divisors (2893930273).

64121205983 is a wasteful number, since it uses less digits than its factorization.

64121205983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418845.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 64121205983 in words is "sixty-four billion, one hundred twenty-one million, two hundred five thousand, nine hundred eighty-three".