1620136612 has 24 divisors (see below), whose sum is σ = 3065128640. Its totient is φ = 746690400.

The previous prime is 1620136589. The next prime is 1620136613. The reversal of 1620136612 is 2166310261.

It is not an unprimeable number, because it can be changed into a prime (1620136613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285264 + ... + 290887.

Almost surely, 2^1620136612 is an apocalyptic number.

It is an amenable number.

1620136612 is a deficient number, since it is larger than the sum of its proper divisors (1444992028).

1620136612 is a wasteful number, since it uses less digits than its factorization.

1620136612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576211 (or 576209 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1620136612 is about 40250.9206354339. The cubic root of 1620136612 is about 1174.4933048732.

Adding to 1620136612 its reverse (2166310261), we get a palindrome (3786446873).

The spelling of 1620136612 in words is "one billion, six hundred twenty million, one hundred thirty-six thousand, six hundred twelve".