2787581823 has 12 divisors (see below), whose sum is σ = 4024675080. Its totient is φ = 1715434656.

The previous prime is 2787581777. The next prime is 2787581831. The reversal of 2787581823 is 3281857872.

It is not a de Polignac number, because 2787581823 - 2⁸ = 2787581567 is a prime.

It is a super-2 number, since 2×2787581823² = 15541224839840006658, which contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787581893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2748588 + ... + 2749601.

It is an arithmetic number, because the mean of its divisors is an integer number (335389590).

Almost surely, 2^2787581823 is an apocalyptic number.

2787581823 is a deficient number, since it is larger than the sum of its proper divisors (1237093257).

2787581823 is a wasteful number, since it uses less digits than its factorization.

2787581823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498218 (or 5498205 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 2787581823 is about 52797.5550854393. Note that the first 3 decimals coincide. The cubic root of 2787581823 is about 1407.3729773571.

The spelling of 2787581823 in words is "two billion, seven hundred eighty-seven million, five hundred eighty-one thousand, eight hundred twenty-three".