2661281530 has 32 divisors (see below), whose sum is σ = 4841726400. Its totient is φ = 1053114240.

The previous prime is 2661281479. The next prime is 2661281537. The reversal of 2661281530 is 351821662.

It is not an unprimeable number, because it can be changed into a prime (2661281537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121245 + ... + 1123615.

It is an arithmetic number, because the mean of its divisors is an integer number (151303950).

Almost surely, 2^2661281530 is an apocalyptic number.

2661281530 is a deficient number, since it is larger than the sum of its proper divisors (2180444870).

2661281530 is a wasteful number, since it uses less digits than its factorization.

2661281530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2661281530 is about 51587.6102373428. The cubic root of 2661281530 is about 1385.7884583378.

The spelling of 2661281530 in words is "two billion, six hundred sixty-one million, two hundred eighty-one thousand, five hundred thirty".