2581771063 has 4 divisors (see below), whose sum is σ = 2592484048. Its totient is φ = 2571058080.

The previous prime is 2581771043. The next prime is 2581771121. The reversal of 2581771063 is 3601771852.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581771063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581771043) 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, 5356131 + ... + 5356612.

It is an arithmetic number, because the mean of its divisors is an integer number (648121012).

Almost surely, 2^2581771063 is an apocalyptic number.

2581771063 is a deficient number, since it is larger than the sum of its proper divisors (10712985).

2581771063 is a wasteful number, since it uses less digits than its factorization.

2581771063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712984.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 2581771063 is about 50811.1312902990. The cubic root of 2581771063 is about 1371.8477320199.

The spelling of 2581771063 in words is "two billion, five hundred eighty-one million, seven hundred seventy-one thousand, sixty-three".