1642653322649 has 8 divisors (see below), whose sum is σ = 1647735857352. Its totient is φ = 1637578639360.

The previous prime is 1642653322559. The next prime is 1642653322679. The reversal of 1642653322649 is 9462233562461.

It can be written as a sum of positive squares in 4 ways, for example, as 826353721600 + 816299601049 = 909040^2 + 903493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642653322649 - 2⁸ = 1642653322393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642653322649.

It is not an unprimeable number, because it can be changed into a prime (1642653322679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1543634 + ... + 2380779.

It is an arithmetic number, because the mean of its divisors is an integer number (205966982169).

Almost surely, 2^{1642653322649} is an apocalyptic number.

It is an amenable number.

1642653322649 is a deficient number, since it is larger than the sum of its proper divisors (5082534703).

1642653322649 is an equidigital number, since it uses as much as digits as its factorization.

1642653322649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925707.

The product of its digits is 11197440, while the sum is 53.

The spelling of 1642653322649 in words is "one trillion, six hundred forty-two billion, six hundred fifty-three million, three hundred twenty-two thousand, six hundred forty-nine".