16900159905 has 12 divisors (see below), whose sum is σ = 29293610580. Its totient is φ = 9013418592.

The previous prime is 16900159897. The next prime is 16900159907. The reversal of 16900159905 is 50995100961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6003305361 + 10896854544 = 77481^2 + 104388^2 .

It is not a de Polignac number, because 16900159905 - 2³ = 16900159897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 375559109 = 16900159905 / (1 + 6 + 9 + 0 + 0 + 1 + 5 + 9 + 9 + 0 + 5).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16900159907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187779510 + ... + 187779599.

It is an arithmetic number, because the mean of its divisors is an integer number (2441134215).

Almost surely, 2^16900159905 is an apocalyptic number.

16900159905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16900159905 is a deficient number, since it is larger than the sum of its proper divisors (12393450675).

16900159905 is a wasteful number, since it uses less digits than its factorization.

16900159905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375559120 (or 375559117 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The spelling of 16900159905 in words is "sixteen billion, nine hundred million, one hundred fifty-nine thousand, nine hundred five".