243968251917064 has 32 divisors (see below), whose sum is σ = 471878892014400. Its totient is φ = 118193574438720.

The previous prime is 243968251916953. The next prime is 243968251917083. The reversal of 243968251917064 is 460719152869342.

It is a super-2 number, since 2×243968251917064² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3730825084 + ... + 3730890475.

It is an arithmetic number, because the mean of its divisors is an integer number (14746215375450).

It is a 2-persistent number, because it is pandigital, and so is 2⋅243968251917064 = 487936503834128, but 3⋅243968251917064 = 731904755751192 is not.

Almost surely, 2^{243968251917064} is an apocalyptic number.

It is an amenable number.

243968251917064 is a deficient number, since it is larger than the sum of its proper divisors (227910640097336).

243968251917064 is a wasteful number, since it uses less digits than its factorization.

243968251917064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461715693 (or 7461715689 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 243968251917064 in words is "two hundred forty-three trillion, nine hundred sixty-eight billion, two hundred fifty-one million, nine hundred seventeen thousand, sixty-four".