1605428554 has 16 divisors (see below), whose sum is σ = 2473538760. Its totient is φ = 781021440.

The previous prime is 1605428537. The next prime is 1605428581. The reversal of 1605428554 is 4558245061.

It can be written as a sum of positive squares in 4 ways, for example, as 719473329 + 885955225 = 26823^2 + 29765^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4342 + ... + 56830.

Almost surely, 2^1605428554 is an apocalyptic number.

1605428554 is a deficient number, since it is larger than the sum of its proper divisors (868110206).

1605428554 is a wasteful number, since it uses less digits than its factorization.

1605428554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52905.

The product of its (nonzero) digits is 192000, while the sum is 40.

The square root of 1605428554 is about 40067.7994654061. The cubic root of 1605428554 is about 1170.9283678008.

The spelling of 1605428554 in words is "one billion, six hundred five million, four hundred twenty-eight thousand, five hundred fifty-four".