3646161323520 has 160 divisors (see below), whose sum is σ = 11663129440512. Its totient is φ = 971741847552.

The previous prime is 3646161323509. The next prime is 3646161323527. The reversal of 3646161323520 is 253231616463.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646161323527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13094869 + ... + 13370411.

Almost surely, 2^{3646161323520} is an apocalyptic number.

3646161323520 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 3646161323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5831564720256).

3646161323520 is an abundant number, since it is smaller than the sum of its proper divisors (8016968116992).

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

3646161323520 is a wasteful number, since it uses less digits than its factorization.

3646161323520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277292 (or 277276 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 3646161323520 its reverse (253231616463), we get a palindrome (3899392939983).

The spelling of 3646161323520 in words is "three trillion, six hundred forty-six billion, one hundred sixty-one million, three hundred twenty-three thousand, five hundred twenty".