2575672781 has 16 divisors (see below), whose sum is σ = 2880227328. Its totient is φ = 2283044400.

The previous prime is 2575672777. The next prime is 2575672819. The reversal of 2575672781 is 1872765752.

2575672781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2575672781 - 2² = 2575672777 is a prime.

It is a super-2 number, since 2×2575672781² = 13268180549568547922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2575672481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282626 + ... + 291596.

It is an arithmetic number, because the mean of its divisors is an integer number (180014208).

Almost surely, 2^2575672781 is an apocalyptic number.

It is an amenable number.

2575672781 is a deficient number, since it is larger than the sum of its proper divisors (304554547).

2575672781 is a wasteful number, since it uses less digits than its factorization.

2575672781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 1646400, while the sum is 50.

The square root of 2575672781 is about 50751.0865006849. The cubic root of 2575672781 is about 1370.7667544407.

The spelling of 2575672781 in words is "two billion, five hundred seventy-five million, six hundred seventy-two thousand, seven hundred eighty-one".