1648630697605 has 4 divisors (see below), whose sum is σ = 1978356837132. Its totient is φ = 1318904558080.

The previous prime is 1648630697591. The next prime is 1648630697621. The reversal of 1648630697605 is 5067960368461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1296357584929 + 352273112676 = 1138577^2 + 593526^2 .

It is not a de Polignac number, because 1648630697605 - 2⁵ = 1648630697573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164863069756 + ... + 164863069765.

It is an arithmetic number, because the mean of its divisors is an integer number (494589209283).

Almost surely, 2^{1648630697605} is an apocalyptic number.

It is an amenable number.

1648630697605 is a deficient number, since it is larger than the sum of its proper divisors (329726139527).

1648630697605 is an equidigital number, since it uses as much as digits as its factorization.

1648630697605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329726139526.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 1648630697605 in words is "one trillion, six hundred forty-eight billion, six hundred thirty million, six hundred ninety-seven thousand, six hundred five".