1646326541 has 2 divisors, whose sum is σ = 1646326542. Its totient is φ = 1646326540.

The previous prime is 1646326531. The next prime is 1646326567. The reversal of 1646326541 is 1456236461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929640100 + 716686441 = 30490^2 + 26771^2 .

It is an emirp because it is prime and its reverse (1456236461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646326541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1646326495 and 1646326504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646326511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823163270 + 823163271.

It is an arithmetic number, because the mean of its divisors is an integer number (823163271).

Almost surely, 2^1646326541 is an apocalyptic number.

It is an amenable number.

1646326541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646326541 is an equidigital number, since it uses as much as digits as its factorization.

1646326541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 1646326541 is about 40574.9496734130. The cubic root of 1646326541 is about 1180.7881694492.

The spelling of 1646326541 in words is "one billion, six hundred forty-six million, three hundred twenty-six thousand, five hundred forty-one".