2587808781 has 12 divisors (see below), whose sum is σ = 3790594080. Its totient is φ = 1700906760.

The previous prime is 2587808753. The next prime is 2587808807. The reversal of 2587808781 is 1878087852.

2587808781 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2587808781 - 2⁷ = 2587808653 is a prime.

It is a super-2 number, since 2×2587808781² = 13393508574041411922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587808081) 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, 2024251 + ... + 2025528.

It is an arithmetic number, because the mean of its divisors is an integer number (315882840).

Almost surely, 2^2587808781 is an apocalyptic number.

It is an amenable number.

2587808781 is a deficient number, since it is larger than the sum of its proper divisors (1202785299).

2587808781 is a wasteful number, since it uses less digits than its factorization.

2587808781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049856 (or 4049853 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 54.

The square root of 2587808781 is about 50870.5099345387. The cubic root of 2587808781 is about 1372.9162984148.

The spelling of 2587808781 in words is "two billion, five hundred eighty-seven million, eight hundred eight thousand, seven hundred eighty-one".