3621421065 has 16 divisors (see below), whose sum is σ = 5950876608. Its totient is φ = 1879223616.

The previous prime is 3621421007. The next prime is 3621421079. The reversal of 3621421065 is 5601241263.

It is not a de Polignac number, because 3621421065 - 2¹⁰ = 3621420041 is a prime.

It is a super-2 number, since 2×3621421065² = 26229381060051468450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3261987 + ... + 3263096.

It is an arithmetic number, because the mean of its divisors is an integer number (371929788).

Almost surely, 2^3621421065 is an apocalyptic number.

It is an amenable number.

3621421065 is a deficient number, since it is larger than the sum of its proper divisors (2329455543).

3621421065 is a wasteful number, since it uses less digits than its factorization.

3621421065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6525128.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 3621421065 is about 60178.2441169564. The cubic root of 3621421065 is about 1535.6527005286.

The spelling of 3621421065 in words is "three billion, six hundred twenty-one million, four hundred twenty-one thousand, sixty-five".