16620693602 has 4 divisors (see below), whose sum is σ = 24931040406. Its totient is φ = 8310346800.

The previous prime is 16620693599. The next prime is 16620693659. The reversal of 16620693602 is 20639602661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16489384921 + 131308681 = 128411^2 + 11459^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16620693602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155173399 + ... + 4155173402.

Almost surely, 2^16620693602 is an apocalyptic number.

16620693602 is a deficient number, since it is larger than the sum of its proper divisors (8310346804).

16620693602 is an equidigital number, since it uses as much as digits as its factorization.

16620693602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310346803.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 16620693602 in words is "sixteen billion, six hundred twenty million, six hundred ninety-three thousand, six hundred two".