1618570445 has 16 divisors (see below), whose sum is σ = 1981981872. Its totient is φ = 1268467200.

The previous prime is 1618570411. The next prime is 1618570453. The reversal of 1618570445 is 5440758161.

It can be written as a sum of positive squares in 8 ways, for example, as 446603689 + 1171966756 = 21133^2 + 34234^2 .

It is not a de Polignac number, because 1618570445 - 2¹² = 1618566349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181409 + ... + 190121.

It is an arithmetic number, because the mean of its divisors is an integer number (123873867).

Almost surely, 2^1618570445 is an apocalyptic number.

It is an amenable number.

1618570445 is a deficient number, since it is larger than the sum of its proper divisors (363411427).

1618570445 is an equidigital number, since it uses as much as digits as its factorization.

1618570445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9472.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 1618570445 is about 40231.4608857297. The cubic root of 1618570445 is about 1174.1147265718.

The spelling of 1618570445 in words is "one billion, six hundred eighteen million, five hundred seventy thousand, four hundred forty-five".