7281315556 has 12 divisors (see below), whose sum is σ = 12744728892. Its totient is φ = 3639964448.

The previous prime is 7281315553. The next prime is 7281315607. The reversal of 7281315556 is 6555131827.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7219221156 + 62094400 = 84966^2 + 7880^2 .

It is not an unprimeable number, because it can be changed into a prime (7281315553) 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, 149335 + ... + 191998.

It is an arithmetic number, because the mean of its divisors is an integer number (1062060741).

Almost surely, 2^7281315556 is an apocalyptic number.

It is an amenable number.

7281315556 is a deficient number, since it is larger than the sum of its proper divisors (5463413336).

7281315556 is a wasteful number, since it uses less digits than its factorization.

7281315556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346670 (or 346668 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The square root of 7281315556 is about 85330.6249596240. The cubic root of 7281315556 is about 1938.2209534570.

The spelling of 7281315556 in words is "seven billion, two hundred eighty-one million, three hundred fifteen thousand, five hundred fifty-six".