16634620063 has 4 divisors (see below), whose sum is σ = 16687766128. Its totient is φ = 16581474000.

The previous prime is 16634620049. The next prime is 16634620103. The reversal of 16634620063 is 36002643661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36002643661 = 8011 ⋅4494151.

It is a cyclic number.

It is not a de Polignac number, because 16634620063 - 2¹³ = 16634611871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634620463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26572563 + ... + 26573188.

It is an arithmetic number, because the mean of its divisors is an integer number (4171941532).

Almost surely, 2^16634620063 is an apocalyptic number.

16634620063 is a deficient number, since it is larger than the sum of its proper divisors (53146065).

16634620063 is an equidigital number, since it uses as much as digits as its factorization.

16634620063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53146064.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 16634620063 in words is "sixteen billion, six hundred thirty-four million, six hundred twenty thousand, sixty-three".