149684287109809 has 27 divisors (see below), whose sum is σ = 155165129305707. Its totient is φ = 144392194506000.

The previous prime is 149684287109779. The next prime is 149684287109821. The reversal of 149684287109809 is 908901782486941.

The square root of 149684287109809 is 12234553.

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

It can be written as a sum of positive squares in only one way, i.e., 129092839781409 + 20591447328400 = 11361903^2 + 4537780^2 .

It is not a de Polignac number, because 149684287109809 - 2¹⁹ = 149684286585521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149684287109869) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 213529653159 + ... + 213529653859.

Almost surely, 2^{149684287109809} is an apocalyptic number.

149684287109809 is the 12234553-rd square number.

149684287109809 is the 6117277-th centered octagonal number.

It is an amenable number.

149684287109809 is a deficient number, since it is larger than the sum of its proper divisors (5480842195898).

149684287109809 is an frugal number, since it uses more digits than its factorization.

149684287109809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 76.

The spelling of 149684287109809 in words is "one hundred forty-nine trillion, six hundred eighty-four billion, two hundred eighty-seven million, one hundred nine thousand, eight hundred nine".