68004312649 has 16 divisors (see below), whose sum is σ = 85644076672. Its totient is φ = 52554313728.

The previous prime is 68004312587. The next prime is 68004312697. The reversal of 68004312649 is 94621340086.

It is a happy number.

It is not a de Polignac number, because 68004312649 - 2⁷ = 68004312521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (68004312049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8685624 + ... + 8693449.

It is an arithmetic number, because the mean of its divisors is an integer number (5352754792).

Almost surely, 2^68004312649 is an apocalyptic number.

It is an amenable number.

68004312649 is a deficient number, since it is larger than the sum of its proper divisors (17639764023).

68004312649 is a wasteful number, since it uses less digits than its factorization.

68004312649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17379136.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 68004312649 in words is "sixty-eight billion, four million, three hundred twelve thousand, six hundred forty-nine".