16690314481 has 27 divisors (see below), whose sum is σ = 18014948833. Its totient is φ = 15461578880.

The previous prime is 16690314479. The next prime is 16690314499. The reversal of 16690314481 is 18441309661.

The square root of 16690314481 is 129191.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3507600625 + 13182713856 = 59225^2 + 114816^2 .

It is not a de Polignac number, because 16690314481 - 2¹ = 16690314479 is a prime.

It is a super-2 number, since 2×16690314481² (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 (16690311481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 121827045 + ... + 121827181.

Almost surely, 2^16690314481 is an apocalyptic number.

16690314481 is the 129191-st square number.

16690314481 is the 64596-th centered octagonal number.

It is an amenable number.

16690314481 is a deficient number, since it is larger than the sum of its proper divisors (1324634352).

16690314481 is an frugal number, since it uses more digits than its factorization.

16690314481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 16690314481 in words is "sixteen billion, six hundred ninety million, three hundred fourteen thousand, four hundred eighty-one".