1601513045 has 18 divisors (see below), whose sum is σ = 2113708086. Its totient is φ = 1164020880.

The previous prime is 1601513009. The next prime is 1601513047. The reversal of 1601513045 is 5403151061.

It can be written as a sum of positive squares in only one way, i.e., 1281210436 + 320302609 = 35794^2 + 17897^2 .

It is not a de Polignac number, because 1601513045 - 2⁶ = 1601512981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601513047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 983522 + ... + 985148.

It is an arithmetic number, because the mean of its divisors is an integer number (117428227).

Almost surely, 2^1601513045 is an apocalyptic number.

It is an amenable number.

1601513045 is a deficient number, since it is larger than the sum of its proper divisors (512195041).

1601513045 is an frugal number, since it uses more digits than its factorization.

1601513045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1601513045 is about 40018.9085933137. The cubic root of 1601513045 is about 1169.9756599997.

The spelling of 1601513045 in words is "one billion, six hundred one million, five hundred thirteen thousand, forty-five".