3656161217 has 16 divisors (see below), whose sum is σ = 3753879552. Its totient is φ = 3560175360.

The previous prime is 3656161177. The next prime is 3656161291. The reversal of 3656161217 is 7121616563.

It is a cyclic number.

It is not a de Polignac number, because 3656161217 - 2¹² = 3656157121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3656167217) 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, 1534367 + ... + 1536747.

It is an arithmetic number, because the mean of its divisors is an integer number (234617472).

Almost surely, 2^3656161217 is an apocalyptic number.

It is an amenable number.

3656161217 is a deficient number, since it is larger than the sum of its proper divisors (97718335).

3656161217 is a wasteful number, since it uses less digits than its factorization.

3656161217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728.

The product of its digits is 45360, while the sum is 38.

The square root of 3656161217 is about 60466.1989627263. The cubic root of 3656161217 is about 1540.5475672713.

The spelling of 3656161217 in words is "three billion, six hundred fifty-six million, one hundred sixty-one thousand, two hundred seventeen".