1648580808421 has 16 divisors (see below), whose sum is σ = 1672628221440. Its totient is φ = 1624615724160.

The previous prime is 1648580808409. The next prime is 1648580808443. The reversal of 1648580808421 is 1248080858461.

It is a cyclic number.

It is not a de Polignac number, because 1648580808421 - 2⁷ = 1648580808293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648580808461) 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, 104220505 + ... + 104236321.

It is an arithmetic number, because the mean of its divisors is an integer number (104539263840).

Almost surely, 2^{1648580808421} is an apocalyptic number.

It is an amenable number.

1648580808421 is a deficient number, since it is larger than the sum of its proper divisors (24047413019).

1648580808421 is a wasteful number, since it uses less digits than its factorization.

1648580808421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18324.

The product of its (nonzero) digits is 3932160, while the sum is 55.

The spelling of 1648580808421 in words is "one trillion, six hundred forty-eight billion, five hundred eighty million, eight hundred eight thousand, four hundred twenty-one".