16988173963 has 4 divisors (see below), whose sum is σ = 17144028880. Its totient is φ = 16832319048.

The previous prime is 16988173907. The next prime is 16988173973. The reversal of 16988173963 is 36937188961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36937188961 = 757 ⋅48794173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16988173963 is a prime.

It is a super-2 number, since 2×16988173963² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16988173973) 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, 77927295 + ... + 77927512.

It is an arithmetic number, because the mean of its divisors is an integer number (4286007220).

Almost surely, 2^16988173963 is an apocalyptic number.

16988173963 is a deficient number, since it is larger than the sum of its proper divisors (155854917).

16988173963 is a wasteful number, since it uses less digits than its factorization.

16988173963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155854916.

The product of its digits is 11757312, while the sum is 61.

The spelling of 16988173963 in words is "sixteen billion, nine hundred eighty-eight million, one hundred seventy-three thousand, nine hundred sixty-three".