3646221465 has 32 divisors (see below), whose sum is σ = 5882544000. Its totient is φ = 1928499200.

The previous prime is 3646221433. The next prime is 3646221493. The reversal of 3646221465 is 5641226463.

It is not a de Polignac number, because 3646221465 - 2⁵ = 3646221433 is a prime.

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, 2276665 + ... + 2278265.

It is an arithmetic number, because the mean of its divisors is an integer number (183829500).

Almost surely, 2^3646221465 is an apocalyptic number.

It is an amenable number.

3646221465 is a deficient number, since it is larger than the sum of its proper divisors (2236322535).

3646221465 is a wasteful number, since it uses less digits than its factorization.

3646221465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777.

The product of its digits is 207360, while the sum is 39.

The square root of 3646221465 is about 60383.9503924677. The cubic root of 3646221465 is about 1539.1502402809.

The spelling of 3646221465 in words is "three billion, six hundred forty-six million, two hundred twenty-one thousand, four hundred sixty-five".