16622623637 has 4 divisors (see below), whose sum is σ = 16630110156. Its totient is φ = 16615137120.

The previous prime is 16622623631. The next prime is 16622623643. The reversal of 16622623637 is 73632622661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73632622661 = 13 ⋅5664047897.

It is an interprime number because it is at equal distance from previous prime (16622623631) and next prime (16622623643).

It can be written as a sum of positive squares in 2 ways, for example, as 11442366961 + 5180256676 = 106969^2 + 71974^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622623637 - 2⁶ = 16622623573 is a prime.

It is a super-2 number, since 2×16622623637² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622623631) 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, 3739928 + ... + 3744369.

It is an arithmetic number, because the mean of its divisors is an integer number (4157527539).

Almost surely, 2^16622623637 is an apocalyptic number.

It is an amenable number.

16622623637 is a deficient number, since it is larger than the sum of its proper divisors (7486519).

16622623637 is an equidigital number, since it uses as much as digits as its factorization.

16622623637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486518.

The product of its digits is 653184, while the sum is 44.

The spelling of 16622623637 in words is "sixteen billion, six hundred twenty-two million, six hundred twenty-three thousand, six hundred thirty-seven".