2561038784 has 14 divisors (see below), whose sum is σ = 5082061464. Its totient is φ = 1280519360.

The previous prime is 2561038771. The next prime is 2561038841. The reversal of 2561038784 is 4878301652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20008052 + ... + 20008179.

Almost surely, 2^2561038784 is an apocalyptic number.

It is an amenable number.

2561038784 is a deficient number, since it is larger than the sum of its proper divisors (2521022680).

2561038784 is an equidigital number, since it uses as much as digits as its factorization.

2561038784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40016243 (or 40016233 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 2561038784 is about 50606.7069072865. The cubic root of 2561038784 is about 1368.1657631173.

The spelling of 2561038784 in words is "two billion, five hundred sixty-one million, thirty-eight thousand, seven hundred eighty-four".