67999305445 has 16 divisors (see below), whose sum is σ = 84329147952. Its totient is φ = 52602941440.

The previous prime is 67999305433. The next prime is 67999305461. The reversal of 67999305445 is 54450399976.

It can be written as a sum of positive squares in 8 ways, for example, as 6955226404 + 61044079041 = 83398^2 + 247071^2 .

It is not a de Polignac number, because 67999305445 - 2¹⁹ = 67998781157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1444552 + ... + 1490881.

It is an arithmetic number, because the mean of its divisors is an integer number (5270571747).

Almost surely, 2^67999305445 is an apocalyptic number.

It is an amenable number.

67999305445 is a deficient number, since it is larger than the sum of its proper divisors (16329842507).

67999305445 is a wasteful number, since it uses less digits than its factorization.

67999305445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935592.

The product of its (nonzero) digits is 36741600, while the sum is 61.

The spelling of 67999305445 in words is "sixty-seven billion, nine hundred ninety-nine million, three hundred five thousand, four hundred forty-five".