3654545820399 has 6 divisors (see below), whose sum is σ = 5278788407256. Its totient is φ = 2436363880260.

The previous prime is 3654545820391. The next prime is 3654545820427. The reversal of 3654545820399 is 9930285454563.

It is a happy number.

3654545820399 is a `hidden beast` number, since 3 + 6 + 5 + 4 + 545 + 82 + 0 + 3 + 9 + 9 = 666.

It is not a de Polignac number, because 3654545820399 - 2³ = 3654545820391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654545820391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203030323347 + ... + 203030323364.

It is an arithmetic number, because the mean of its divisors is an integer number (879798067876).

Almost surely, 2^{3654545820399} is an apocalyptic number.

3654545820399 is a deficient number, since it is larger than the sum of its proper divisors (1624242586857).

3654545820399 is a wasteful number, since it uses less digits than its factorization.

3654545820399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406060646717 (or 406060646714 counting only the distinct ones).

The product of its (nonzero) digits is 139968000, while the sum is 63.

The spelling of 3654545820399 in words is "three trillion, six hundred fifty-four billion, five hundred forty-five million, eight hundred twenty thousand, three hundred ninety-nine".