16725381623 has 4 divisors (see below), whose sum is σ = 16745754408. Its totient is φ = 16705008840.

The previous prime is 16725381619. The next prime is 16725381637. The reversal of 16725381623 is 32618352761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32618352761 = 17 ⋅1918726633.

It is a cyclic number.

It is not a de Polignac number, because 16725381623 - 2² = 16725381619 is a prime.

It is a super-2 number, since 2×16725381623² (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 (16725381653) 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, 10185161 + ... + 10186802.

It is an arithmetic number, because the mean of its divisors is an integer number (4186438602).

Almost surely, 2^16725381623 is an apocalyptic number.

16725381623 is a deficient number, since it is larger than the sum of its proper divisors (20372785).

16725381623 is an equidigital number, since it uses as much as digits as its factorization.

16725381623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20372784.

The product of its digits is 362880, while the sum is 44.

The spelling of 16725381623 in words is "sixteen billion, seven hundred twenty-five million, three hundred eighty-one thousand, six hundred twenty-three".