1648832388461 has 4 divisors (see below), whose sum is σ = 1649045396124. Its totient is φ = 1648619380800.

The previous prime is 1648832388443. The next prime is 1648832388487.

1648832388461 is nontrivially palindromic in base 10.

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 846050436100 + 802781952361 = 919810^2 + 895981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648832388461 - 2²² = 1648828194157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1648832388394 and 1648832388403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648832388061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106492220 + ... + 106507701.

It is an arithmetic number, because the mean of its divisors is an integer number (412261349031).

Almost surely, 2^{1648832388461} is an apocalyptic number.

It is an amenable number.

1648832388461 is a deficient number, since it is larger than the sum of its proper divisors (213007663).

1648832388461 is an equidigital number, since it uses as much as digits as its factorization.

1648832388461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213007662.

The product of its digits is 42467328, while the sum is 62.

The spelling of 1648832388461 in words is "one trillion, six hundred forty-eight billion, eight hundred thirty-two million, three hundred eighty-eight thousand, four hundred sixty-one".