1611057603 has 4 divisors (see below), whose sum is σ = 2148076808. Its totient is φ = 1074038400.

The previous prime is 1611057593. The next prime is 1611057629. The reversal of 1611057603 is 3067501161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1611057603 - 2¹³ = 1611049411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611057673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268509598 + ... + 268509603.

It is an arithmetic number, because the mean of its divisors is an integer number (537019202).

Almost surely, 2^1611057603 is an apocalyptic number.

1611057603 is a deficient number, since it is larger than the sum of its proper divisors (537019205).

1611057603 is an equidigital number, since it uses as much as digits as its factorization.

1611057603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537019204.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1611057603 is about 40137.9820494255. The cubic root of 1611057603 is about 1172.2952976487.

Adding to 1611057603 its reverse (3067501161), we get a palindrome (4678558764).

The spelling of 1611057603 in words is "one billion, six hundred eleven million, fifty-seven thousand, six hundred three".