2581567928 has 8 divisors (see below), whose sum is σ = 4840439880. Its totient is φ = 1290783960.

The previous prime is 2581567927. The next prime is 2581568021. The reversal of 2581567928 is 8297651852.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2581567928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581567927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161347988 + ... + 161348003.

It is an arithmetic number, because the mean of its divisors is an integer number (605054985).

Almost surely, 2^2581567928 is an apocalyptic number.

It is an amenable number.

2581567928 is a deficient number, since it is larger than the sum of its proper divisors (2258871952).

2581567928 is a wasteful number, since it uses less digits than its factorization.

2581567928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322695997 (or 322695993 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The square root of 2581567928 is about 50809.1323287458. The cubic root of 2581567928 is about 1371.8117518612.

The spelling of 2581567928 in words is "two billion, five hundred eighty-one million, five hundred sixty-seven thousand, nine hundred twenty-eight".