2801613581 has 4 divisors (see below), whose sum is σ = 3017122332. Its totient is φ = 2586104832.

The previous prime is 2801613571. The next prime is 2801613587. The reversal of 2801613581 is 1853161082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1643572681 + 1158040900 = 40541^2 + 34030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2801613581 - 2¹⁰ = 2801612557 is a prime.

It is a super-2 number, since 2×2801613581² = 15698077314487287122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801613587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107754356 + ... + 107754381.

It is an arithmetic number, because the mean of its divisors is an integer number (754280583).

Almost surely, 2^2801613581 is an apocalyptic number.

It is an amenable number.

2801613581 is a deficient number, since it is larger than the sum of its proper divisors (215508751).

2801613581 is a wasteful number, since it uses less digits than its factorization.

2801613581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215508750.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 2801613581 is about 52930.2709326147. The cubic root of 2801613581 is about 1409.7304417385.

The spelling of 2801613581 in words is "two billion, eight hundred one million, six hundred thirteen thousand, five hundred eighty-one".