64123941428 has 12 divisors (see below), whose sum is σ = 112399963620. Its totient is φ = 32009666112.

The previous prime is 64123941421. The next prime is 64123941437. The reversal of 64123941428 is 82414932146.

It can be written as a sum of positive squares in 2 ways, for example, as 30820611364 + 33303330064 = 175558^2 + 182492^2 .

It is a super-2 number, since 2×64123941428² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64123941421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13073393 + ... + 13078296.

It is an arithmetic number, because the mean of its divisors is an integer number (9366663635).

Almost surely, 2^64123941428 is an apocalyptic number.

It is an amenable number.

64123941428 is a deficient number, since it is larger than the sum of its proper divisors (48276022192).

64123941428 is a wasteful number, since it uses less digits than its factorization.

64123941428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26152306 (or 26152304 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The spelling of 64123941428 in words is "sixty-four billion, one hundred twenty-three million, nine hundred forty-one thousand, four hundred twenty-eight".