1620716522 has 32 divisors (see below), whose sum is σ = 2620978560. Its totient is φ = 748915200.

The previous prime is 1620716519. The next prime is 1620716527. The reversal of 1620716522 is 2256170261.

It is not an unprimeable number, because it can be changed into a prime (1620716527) 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, 455153 + ... + 458699.

It is an arithmetic number, because the mean of its divisors is an integer number (81905580).

Almost surely, 2^1620716522 is an apocalyptic number.

1620716522 is a deficient number, since it is larger than the sum of its proper divisors (1000262038).

1620716522 is a wasteful number, since it uses less digits than its factorization.

1620716522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1620716522 is about 40258.1236770916. The cubic root of 1620716522 is about 1174.6334204576.

Adding to 1620716522 its reverse (2256170261), we get a palindrome (3876886783).

The spelling of 1620716522 in words is "one billion, six hundred twenty million, seven hundred sixteen thousand, five hundred twenty-two".