1613003265 has 24 divisors (see below), whose sum is σ = 2960336808. Its totient is φ = 809664000.

The previous prime is 1613003243. The next prime is 1613003269. The reversal of 1613003265 is 5623003161.

It can be written as a sum of positive squares in 4 ways, for example, as 568679409 + 1044323856 = 23847^2 + 32316^2 .

It is not a de Polignac number, because 1613003265 - 2⁶ = 1613003201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1613003269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1053486 + ... + 1055015.

It is an arithmetic number, because the mean of its divisors is an integer number (123347367).

Almost surely, 2^1613003265 is an apocalyptic number.

1613003265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1613003265 is a deficient number, since it is larger than the sum of its proper divisors (1347333543).

1613003265 is a wasteful number, since it uses less digits than its factorization.

1613003265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108529 (or 2108526 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1613003265 is about 40162.2119037286. The cubic root of 1613003265 is about 1172.7670318313.

The spelling of 1613003265 in words is "one billion, six hundred thirteen million, three thousand, two hundred sixty-five".