1616855441 has 2 divisors, whose sum is σ = 1616855442. Its totient is φ = 1616855440.

The previous prime is 1616855351. The next prime is 1616855453. The reversal of 1616855441 is 1445586161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095874816 + 520980625 = 33104^2 + 22825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616855441 - 2¹⁰ = 1616854417 is a prime.

It is a super-2 number, since 2×1616855441² = 5228443034182608962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616855041) 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, 808427720 + 808427721.

It is an arithmetic number, because the mean of its divisors is an integer number (808427721).

Almost surely, 2^1616855441 is an apocalyptic number.

It is an amenable number.

1616855441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616855441 is an equidigital number, since it uses as much as digits as its factorization.

1616855441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 41.

The square root of 1616855441 is about 40210.1410218865. The cubic root of 1616855441 is about 1173.6998907370.

The spelling of 1616855441 in words is "one billion, six hundred sixteen million, eight hundred fifty-five thousand, four hundred forty-one".