2788959581 has 4 divisors (see below), whose sum is σ = 2807429664. Its totient is φ = 2770489500.

The previous prime is 2788959577. The next prime is 2788959629. The reversal of 2788959581 is 1859598872.

2788959581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2788959581 - 2² = 2788959577 is a prime.

It is a super-2 number, since 2×2788959581² = 15556591088903391122, 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 (2788959521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9234815 + ... + 9235116.

It is an arithmetic number, because the mean of its divisors is an integer number (701857416).

Almost surely, 2^2788959581 is an apocalyptic number.

It is an amenable number.

2788959581 is a deficient number, since it is larger than the sum of its proper divisors (18470083).

2788959581 is a wasteful number, since it uses less digits than its factorization.

2788959581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18470082.

The product of its digits is 14515200, while the sum is 62.

The square root of 2788959581 is about 52810.6010285814. The cubic root of 2788959581 is about 1407.6048031398.

The spelling of 2788959581 in words is "two billion, seven hundred eighty-eight million, nine hundred fifty-nine thousand, five hundred eighty-one".