3651223540 has 96 divisors (see below), whose sum is σ = 8379907200. Its totient is φ = 1331043840.

The previous prime is 3651223489. The next prime is 3651223567. The reversal of 3651223540 is 453221563.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4639027 + ... + 4639813.

It is an arithmetic number, because the mean of its divisors is an integer number (87290700).

Almost surely, 2^3651223540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651223540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4189953600).

3651223540 is an abundant number, since it is smaller than the sum of its proper divisors (4728683660).

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

3651223540 is a wasteful number, since it uses less digits than its factorization.

3651223540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 3651223540 is about 60425.3551085966. The cubic root of 3651223540 is about 1539.8537472848.

The spelling of 3651223540 in words is "three billion, six hundred fifty-one million, two hundred twenty-three thousand, five hundred forty".