16903691320545 has 24 divisors (see below), whose sum is σ = 30310067197800. Its totient is φ = 8704429552896.

The previous prime is 16903691320441. The next prime is 16903691320577. The reversal of 16903691320545 is 54502319630961.

16903691320545 is a `hidden beast` number, since 1 + 6 + 9 + 0 + 3 + 6 + 91 + 3 + 2 + 0 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4435476087249 + 12468215233296 = 2106057^2 + 3531036^2 .

It is not a de Polignac number, because 16903691320545 - 2¹⁴ = 16903691304161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16903691320491 and 16903691320500.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6476508780 + ... + 6476511389.

It is an arithmetic number, because the mean of its divisors is an integer number (1262919466575).

Almost surely, 2^{16903691320545} is an apocalyptic number.

16903691320545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16903691320545 is a deficient number, since it is larger than the sum of its proper divisors (13406375877255).

16903691320545 is a wasteful number, since it uses less digits than its factorization.

16903691320545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12953020209 (or 12953020206 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 16903691320545 in words is "sixteen trillion, nine hundred three billion, six hundred ninety-one million, three hundred twenty thousand, five hundred forty-five".