1611551045 has 18 divisors (see below), whose sum is σ = 2095580214. Its totient is φ = 1189206720.

The previous prime is 1611550999. The next prime is 1611551047. The reversal of 1611551045 is 5401551161.

It can be written as a sum of positive squares in 9 ways, for example, as 988599364 + 622951681 = 31442^2 + 24959^2 .

It is not a de Polignac number, because 1611551045 - 2¹⁰ = 1611550021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1611550999 and 1611551017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611551047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1166255 + ... + 1167635.

It is an arithmetic number, because the mean of its divisors is an integer number (116421123).

Almost surely, 2^1611551045 is an apocalyptic number.

It is an amenable number.

1611551045 is a deficient number, since it is larger than the sum of its proper divisors (484029169).

1611551045 is an frugal number, since it uses more digits than its factorization.

1611551045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 1611551045 is about 40144.1284000537. The cubic root of 1611551045 is about 1172.4149707313.

The spelling of 1611551045 in words is "one billion, six hundred eleven million, five hundred fifty-one thousand, forty-five".