17552990623 has 4 divisors (see below), whose sum is σ = 20060560720. Its totient is φ = 15045420528.

The previous prime is 17552990579. The next prime is 17552990629. The reversal of 17552990623 is 32609925571.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32609925571 = 3203 ⋅10181057.

It is a cyclic number.

It is not a de Polignac number, because 17552990623 - 2⁹ = 17552990111 is a prime.

It is a super-2 number, since 2×17552990623² (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 (17552990629) 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, 1253785038 + ... + 1253785051.

It is an arithmetic number, because the mean of its divisors is an integer number (5015140180).

Almost surely, 2^17552990623 is an apocalyptic number.

17552990623 is a deficient number, since it is larger than the sum of its proper divisors (2507570097).

17552990623 is an equidigital number, since it uses as much as digits as its factorization.

17552990623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507570096.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 17552990623 in words is "seventeen billion, five hundred fifty-two million, nine hundred ninety thousand, six hundred twenty-three".