2561642030 has 16 divisors (see below), whose sum is σ = 4611972384. Its totient is φ = 1024430880.

The previous prime is 2561642011. The next prime is 2561642047. The reversal of 2561642030 is 302461652.

It is a junction number, because it is equal to n+sod(n) for n = 2561641984 and 2561642002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23975 + ... + 75485.

It is an arithmetic number, because the mean of its divisors is an integer number (288248274).

Almost surely, 2^2561642030 is an apocalyptic number.

2561642030 is a deficient number, since it is larger than the sum of its proper divisors (2050330354).

2561642030 is a wasteful number, since it uses less digits than its factorization.

2561642030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56491.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2561642030 is about 50612.6666952059. Note that the first 4 decimals coincide. The cubic root of 2561642030 is about 1368.2731773087.

The spelling of 2561642030 in words is "two billion, five hundred sixty-one million, six hundred forty-two thousand, thirty".