3980065621 has 12 divisors (see below), whose sum is σ = 4640639040. Its totient is φ = 3403551480.

The previous prime is 3980065561. The next prime is 3980065637. The reversal of 3980065621 is 1265600893.

It is a de Polignac number, because none of the positive numbers 2^k-3980065621 is a prime.

It is a super-2 number, since 2×3980065621² = 31681844694932231282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3980062621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73111 + ... + 115348.

It is an arithmetic number, because the mean of its divisors is an integer number (386719920).

Almost surely, 2^3980065621 is an apocalyptic number.

It is an amenable number.

3980065621 is a deficient number, since it is larger than the sum of its proper divisors (660573419).

3980065621 is a wasteful number, since it uses less digits than its factorization.

3980065621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188904 (or 188897 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 3980065621 is about 63087.7612615949. The cubic root of 3980065621 is about 1584.7596713903.

The spelling of 3980065621 in words is "three billion, nine hundred eighty million, sixty-five thousand, six hundred twenty-one".