3643126620 has 96 divisors (see below), whose sum is σ = 11765107200. Its totient is φ = 825064704.

The previous prime is 3643126609. The next prime is 3643126649. The reversal of 3643126620 is 266213463.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5991 + ... + 85569.

It is an arithmetic number, because the mean of its divisors is an integer number (122553200).

Almost surely, 2^3643126620 is an apocalyptic number.

3643126620 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 3643126620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5882553600).

3643126620 is an abundant number, since it is smaller than the sum of its proper divisors (8121980580).

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

3643126620 is a wasteful number, since it uses less digits than its factorization.

3643126620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79707 (or 79705 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 3643126620 is about 60358.3185650495. The cubic root of 3643126620 is about 1538.7146496463.

The spelling of 3643126620 in words is "three billion, six hundred forty-three million, one hundred twenty-six thousand, six hundred twenty".