3420815656 has 32 divisors (see below), whose sum is σ = 6519513600. Its totient is φ = 1682441280.

The previous prime is 3420815653. The next prime is 3420815681. The reversal of 3420815656 is 6565180243.

It is not an unprimeable number, because it can be changed into a prime (3420815653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161286 + ... + 181258.

It is an arithmetic number, because the mean of its divisors is an integer number (203734800).

Almost surely, 2^3420815656 is an apocalyptic number.

It is an amenable number.

3420815656 is a deficient number, since it is larger than the sum of its proper divisors (3098697944).

3420815656 is a wasteful number, since it uses less digits than its factorization.

3420815656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20329 (or 20325 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 3420815656 is about 58487.7393647592. The cubic root of 3420815656 is about 1506.7570206689.

Adding to 3420815656 its reverse (6565180243), we get a palindrome (9985995899).

The spelling of 3420815656 in words is "three billion, four hundred twenty million, eight hundred fifteen thousand, six hundred fifty-six".