1663155360 has 72 divisors (see below), whose sum is σ = 5675522580. Its totient is φ = 443507712.

The previous prime is 1663155359. The next prime is 1663155379. The reversal of 1663155360 is 635513661.

1663155360 is a `hidden beast` number, since 16 + 6 + 31 + 553 + 60 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1408050576 + 255104784 = 37524^2 + 15972^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 11 ways as a sum of consecutive naturals, for example, 576045 + ... + 578924.

Almost surely, 2^1663155360 is an apocalyptic number.

1663155360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663155360 is an abundant number, since it is smaller than the sum of its proper divisors (4012367220).

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

1663155360 is a wasteful number, since it uses less digits than its factorization.

1663155360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154990 (or 1154979 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1663155360 is about 40781.8018238528. The cubic root of 1663155360 is about 1184.7978932143.

The spelling of 1663155360 in words is "one billion, six hundred sixty-three million, one hundred fifty-five thousand, three hundred sixty".