4006545681329 has 2 divisors, whose sum is σ = 4006545681330. Its totient is φ = 4006545681328.

The previous prime is 4006545681287. The next prime is 4006545681349. The reversal of 4006545681329 is 9231865456004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3422322402304 + 584223279025 = 1849952^2 + 764345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4006545681329 is a prime.

It is not a weakly prime, because it can be changed into another prime (4006545681349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003272840664 + 2003272840665.

It is an arithmetic number, because the mean of its divisors is an integer number (2003272840665).

Almost surely, 2^{4006545681329} is an apocalyptic number.

It is an amenable number.

4006545681329 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006545681329 is an equidigital number, since it uses as much as digits as its factorization.

4006545681329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 4006545681329 in words is "four trillion, six billion, five hundred forty-five million, six hundred eighty-one thousand, three hundred twenty-nine".