19407797980189 has 2 divisors, whose sum is σ = 19407797980190. Its totient is φ = 19407797980188.

The previous prime is 19407797980171. The next prime is 19407797980213. The reversal of 19407797980189 is 98108979770491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18885586520025 + 522211460164 = 4345755^2 + 722642^2 .

It is a cyclic number.

It is not a de Polignac number, because 19407797980189 - 2⁵ = 19407797980157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19407797980489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9703898990094 + 9703898990095.

It is an arithmetic number, because the mean of its divisors is an integer number (9703898990095).

Almost surely, 2^{19407797980189} is an apocalyptic number.

It is an amenable number.

19407797980189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19407797980189 is an equidigital number, since it uses as much as digits as its factorization.

19407797980189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576108288, while the sum is 79.

The spelling of 19407797980189 in words is "nineteen trillion, four hundred seven billion, seven hundred ninety-seven million, nine hundred eighty thousand, one hundred eighty-nine".