1619855122097 has 8 divisors (see below), whose sum is σ = 1622949578472. Its totient is φ = 1616761036800.

The previous prime is 1619855122073. The next prime is 1619855122111. The reversal of 1619855122097 is 7902215589161.

It can be written as a sum of positive squares in 4 ways, for example, as 165843603121 + 1454011518976 = 407239^2 + 1205824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1619855122097 - 2²⁰ = 1619854073521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1619855122027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9611723 + ... + 9778799.

It is an arithmetic number, because the mean of its divisors is an integer number (202868697309).

Almost surely, 2^{1619855122097} is an apocalyptic number.

It is an amenable number.

1619855122097 is a deficient number, since it is larger than the sum of its proper divisors (3094456375).

1619855122097 is a wasteful number, since it uses less digits than its factorization.

1619855122097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185539.

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 1619855122097 in words is "one trillion, six hundred nineteen billion, eight hundred fifty-five million, one hundred twenty-two thousand, ninety-seven".