1608780545 has 8 divisors (see below), whose sum is σ = 1930789224. Its totient is φ = 1286856064.

The previous prime is 1608780479. The next prime is 1608780577. The reversal of 1608780545 is 5450878061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 524593216 + 1084187329 = 22904^2 + 32927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1608780545 - 2¹⁴ = 1608764161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1608780496 and 1608780505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34157 + ... + 66213.

It is an arithmetic number, because the mean of its divisors is an integer number (241348653).

Almost surely, 2^1608780545 is an apocalyptic number.

It is an amenable number.

1608780545 is a deficient number, since it is larger than the sum of its proper divisors (322008679).

1608780545 is a wasteful number, since it uses less digits than its factorization.

1608780545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42099.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 1608780545 is about 40109.6066422995. The cubic root of 1608780545 is about 1171.7427324685.

The spelling of 1608780545 in words is "one billion, six hundred eight million, seven hundred eighty thousand, five hundred forty-five".