1628879641 has 2 divisors, whose sum is σ = 1628879642. Its totient is φ = 1628879640.

The previous prime is 1628879543. The next prime is 1628879647. The reversal of 1628879641 is 1469788261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185356041 + 443523600 = 34429^2 + 21060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1628879641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1628879647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814439820 + 814439821.

It is an arithmetic number, because the mean of its divisors is an integer number (814439821).

Almost surely, 2^1628879641 is an apocalyptic number.

It is an amenable number.

1628879641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628879641 is an equidigital number, since it uses as much as digits as its factorization.

1628879641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 1628879641 is about 40359.3810780096. The cubic root of 1628879641 is about 1176.6022243016.

The spelling of 1628879641 in words is "one billion, six hundred twenty-eight million, eight hundred seventy-nine thousand, six hundred forty-one".