1219140597609 has 135 divisors (see below), whose sum is σ = 2116307019981. Its totient is φ = 698792553360.

The previous prime is 1219140597599. The next prime is 1219140597659. The reversal of 1219140597609 is 9067950419121.

It is a happy number.

The square root of 1219140597609 is 1104147.

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

1219140597609 is a `hidden beast` number, since 1 + 2 + 1 + 9 + 1 + 40 + 597 + 6 + 0 + 9 = 666.

It is not a de Polignac number, because 1219140597609 - 2¹⁹ = 1219140073321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1219140597659) 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 134 ways as a sum of consecutive naturals, for example, 2076900214 + ... + 2076900800.

Almost surely, 2^{1219140597609} is an apocalyptic number.

1219140597609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1219140597609 is the 1104147-th square number.

1219140597609 is the 552074-th centered octagonal number.

It is an amenable number.

1219140597609 is a deficient number, since it is larger than the sum of its proper divisors (897166422372).

1219140597609 is an frugal number, since it uses more digits than its factorization.

1219140597609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 1219140597609 in words is "one trillion, two hundred nineteen billion, one hundred forty million, five hundred ninety-seven thousand, six hundred nine".