68035645439 has 4 divisors (see below), whose sum is σ = 68967640656. Its totient is φ = 67103650224.

The previous prime is 68035645427. The next prime is 68035645451. The reversal of 68035645439 is 93454653086.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68035645427) and next prime (68035645451).

It is a cyclic number.

It is not a de Polignac number, because 68035645439 - 2¹² = 68035641343 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68035645739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465997499 + ... + 465997644.

It is an arithmetic number, because the mean of its divisors is an integer number (17241910164).

Almost surely, 2^68035645439 is an apocalyptic number.

68035645439 is a deficient number, since it is larger than the sum of its proper divisors (931995217).

68035645439 is an equidigital number, since it uses as much as digits as its factorization.

68035645439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931995216.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 68035645439 in words is "sixty-eight billion, thirty-five million, six hundred forty-five thousand, four hundred thirty-nine".