3651181560 has 192 divisors, whose sum is σ = 12823181280. Its totient is φ = 895656960.

The previous prime is 3651181553. The next prime is 3651181561. The reversal of 3651181560 is 651811563.

3651181560 is a `hidden beast` number, since 3 + 6 + 5 + 11 + 81 + 560 = 666.

It is a super-2 number, since 2×3651181560² = 26662253568168067200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651181561) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1547902 + ... + 1550258.

Almost surely, 2^3651181560 is an apocalyptic number.

3651181560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651181560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6411590640).

3651181560 is an abundant number, since it is smaller than the sum of its proper divisors (9171999720).

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

3651181560 is a wasteful number, since it uses less digits than its factorization.

3651181560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 3651181560 is about 60425.0077368634. The cubic root of 3651181560 is about 1539.8478457646.

The spelling of 3651181560 in words is "three billion, six hundred fifty-one million, one hundred eighty-one thousand, five hundred sixty".