1646828453 has 2 divisors, whose sum is σ = 1646828454. Its totient is φ = 1646828452.

The previous prime is 1646828429. The next prime is 1646828483. The reversal of 1646828453 is 3548286461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157224324 + 489604129 = 34018^2 + 22127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1646828453 - 2¹⁸ = 1646566309 is a prime.

It is a super-2 number, since 2×1646828453² = 5424087907220746418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646828398 and 1646828407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646828413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823414226 + 823414227.

It is an arithmetic number, because the mean of its divisors is an integer number (823414227).

Almost surely, 2^1646828453 is an apocalyptic number.

It is an amenable number.

1646828453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646828453 is an equidigital number, since it uses as much as digits as its factorization.

1646828453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 47.

The square root of 1646828453 is about 40581.1342005124. The cubic root of 1646828453 is about 1180.9081520327.

The spelling of 1646828453 in words is "one billion, six hundred forty-six million, eight hundred twenty-eight thousand, four hundred fifty-three".