1611385145 has 16 divisors (see below), whose sum is σ = 2011934160. Its totient is φ = 1237442304.

The previous prime is 1611385099. The next prime is 1611385169. The reversal of 1611385145 is 5415831161.

It can be written as a sum of positive squares in 8 ways, for example, as 170119849 + 1441265296 = 13043^2 + 37964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611385145 - 2⁶ = 1611385081 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 7034 + ... + 57203.

It is an arithmetic number, because the mean of its divisors is an integer number (125745885).

Almost surely, 2^1611385145 is an apocalyptic number.

It is an amenable number.

1611385145 is a deficient number, since it is larger than the sum of its proper divisors (400549015).

1611385145 is a wasteful number, since it uses less digits than its factorization.

1611385145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64444.

The product of its digits is 14400, while the sum is 35.

The square root of 1611385145 is about 40142.0620422021. The cubic root of 1611385145 is about 1172.3747382031.

The spelling of 1611385145 in words is "one billion, six hundred eleven million, three hundred eighty-five thousand, one hundred forty-five".