3654545820391 has 2 divisors, whose sum is σ = 3654545820392. Its totient is φ = 3654545820390.

The previous prime is 3654545820389. The next prime is 3654545820427. The reversal of 3654545820391 is 1930285454563.

It is a weak prime.

It is an emirp because it is prime and its reverse (1930285454563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3654545820391 - 2¹ = 3654545820389 is a prime.

Together with 3654545820389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3654545820361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827272910195 + 1827272910196.

It is an arithmetic number, because the mean of its divisors is an integer number (1827272910196).

Almost surely, 2^{3654545820391} is an apocalyptic number.

3654545820391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3654545820391 is an equidigital number, since it uses as much as digits as its factorization.

3654545820391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 3654545820391 in words is "three trillion, six hundred fifty-four billion, five hundred forty-five million, eight hundred twenty thousand, three hundred ninety-one".