2085390816649 has 16 divisors (see below), whose sum is σ = 2406554212608. Its totient is φ = 1770041636352.

The previous prime is 2085390816617. The next prime is 2085390816659. The reversal of 2085390816649 is 9466180935802.

It is a cyclic number.

It is not a de Polignac number, because 2085390816649 - 2⁵ = 2085390816617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2085390816659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19425729 + ... + 19532785.

It is an arithmetic number, because the mean of its divisors is an integer number (150409638288).

Almost surely, 2^{2085390816649} is an apocalyptic number.

It is an amenable number.

2085390816649 is a deficient number, since it is larger than the sum of its proper divisors (321163395959).

2085390816649 is a wasteful number, since it uses less digits than its factorization.

2085390816649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134184.

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 2085390816649 in words is "two trillion, eighty-five billion, three hundred ninety million, eight hundred sixteen thousand, six hundred forty-nine".