19413690773409 has 27 divisors (see below), whose sum is σ = 28105894667539. Its totient is φ = 12913036599840.

The previous prime is 19413690773387. The next prime is 19413690773423. The reversal of 19413690773409 is 90437709631491.

The square root of 19413690773409 is 4406097.

It is a perfect power (a square), and thus also a powerful number.

19413690773409 is a `hidden beast` number, since 1 + 9 + 4 + 136 + 90 + 7 + 7 + 3 + 409 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5567254407009 + 13846436366400 = 2359503^2 + 3721080^2 .

It is not a de Polignac number, because 19413690773409 - 2³³ = 19405100838817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19413690773509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6886728202 + ... + 6886731020.

Almost surely, 2^{19413690773409} is an apocalyptic number.

19413690773409 is the 4406097-th square number.

19413690773409 is the 2203049-th centered octagonal number.

It is an amenable number.

19413690773409 is a deficient number, since it is larger than the sum of its proper divisors (8692203894130).

19413690773409 is an frugal number, since it uses more digits than its factorization.

19413690773409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6686 (or 3343 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

The spelling of 19413690773409 in words is "nineteen trillion, four hundred thirteen billion, six hundred ninety million, seven hundred seventy-three thousand, four hundred nine".