1645060216 has 64 divisors (see below), whose sum is σ = 3344885280. Its totient is φ = 755589120.

The previous prime is 1645060187. The next prime is 1645060217. The reversal of 1645060216 is 6120605461.

It is a super-2 number, since 2×1645060216² = 5412446228531933312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645060217) 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, 1736655 + ... + 1737601.

Almost surely, 2^1645060216 is an apocalyptic number.

It is an amenable number.

1645060216 is an abundant number, since it is smaller than the sum of its proper divisors (1699825064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645060216 is a wasteful number, since it uses less digits than its factorization.

1645060216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1645060216 is about 40559.3419078762. The cubic root of 1645060216 is about 1180.4853447297.

Adding to 1645060216 its reverse (6120605461), we get a palindrome (7765665677).

The spelling of 1645060216 in words is "one billion, six hundred forty-five million, sixty thousand, two hundred sixteen".