1605412443 has 16 divisors (see below), whose sum is σ = 2249934336. Its totient is φ = 1016262720.

The previous prime is 1605412409. The next prime is 1605412451. The reversal of 1605412443 is 3442145061.

It is not a de Polignac number, because 1605412443 - 2⁶ = 1605412379 is a prime.

It is a super-2 number, since 2×1605412443² = 5154698224278456498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1605412443.

It is not an unprimeable number, because it can be changed into a prime (1605412843) 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, 75463 + ... + 94368.

It is an arithmetic number, because the mean of its divisors is an integer number (140620896).

Almost surely, 2^1605412443 is an apocalyptic number.

1605412443 is a deficient number, since it is larger than the sum of its proper divisors (644521893).

1605412443 is a wasteful number, since it uses less digits than its factorization.

1605412443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169994.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1605412443 is about 40067.5984181733. The cubic root of 1605412443 is about 1170.9244509048.

The spelling of 1605412443 in words is "one billion, six hundred five million, four hundred twelve thousand, four hundred forty-three".