19497164848538 has 16 divisors (see below), whose sum is σ = 33348091913640. Its totient is φ = 8469356676096.

The previous prime is 19497164848517. The next prime is 19497164848549. The reversal of 19497164848538 is 83584846179491.

It can be written as a sum of positive squares in 4 ways, for example, as 19136976423889 + 360188424649 = 4374583^2 + 600157^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22055615903 + ... + 22055616786.

Almost surely, 2^{19497164848538} is an apocalyptic number.

19497164848538 is a deficient number, since it is larger than the sum of its proper divisors (13850927065102).

19497164848538 is a wasteful number, since it uses less digits than its factorization.

19497164848538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44111232721.

The product of its digits is 1672151040, while the sum is 77.

The spelling of 19497164848538 in words is "nineteen trillion, four hundred ninety-seven billion, one hundred sixty-four million, eight hundred forty-eight thousand, five hundred thirty-eight".