1155555648 has 84 divisors (see below), whose sum is σ = 3566998708. Its totient is φ = 355553280.

The previous prime is 1155555647. The next prime is 1155555649. The reversal of 1155555648 is 8465555511.

1155555648 is a `hidden beast` number, since 1 + 1 + 5 + 55 + 556 + 48 = 666.

It is an interprime number because it is at equal distance from previous prime (1155555647) and next prime (1155555649).

It can be written as a sum of positive squares in 2 ways, for example, as 118200384 + 1037355264 = 10872^2 + 32208^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155555647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69673 + ... + 84648.

Almost surely, 2^1155555648 is an apocalyptic number.

1155555648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1155555648 is an abundant number, since it is smaller than the sum of its proper divisors (2411443060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155555648 is a wasteful number, since it uses less digits than its factorization.

1155555648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154352 (or 154339 counting only the distinct ones).

The product of its digits is 600000, while the sum is 45.

The square root of 1155555648 is about 33993.4647836904. The cubic root of 1155555648 is about 1049.3739724043.

The spelling of 1155555648 in words is "one billion, one hundred fifty-five million, five hundred fifty-five thousand, six hundred forty-eight".