148505894209 has 4 divisors (see below), whose sum is σ = 148652495316. Its totient is φ = 148359293104.

The previous prime is 148505894191. The next prime is 148505894213. The reversal of 148505894209 is 902498505841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4279122225 + 144226771984 = 65415^2 + 379772^2 .

It is a cyclic number.

It is not a de Polignac number, because 148505894209 - 2²⁵ = 148472339777 is a prime.

It is a super-2 number, since 2×148505894209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148505894209.

It is not an unprimeable number, because it can be changed into a prime (148505894269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73299034 + ... + 73301059.

It is an arithmetic number, because the mean of its divisors is an integer number (37163123829).

Almost surely, 2^148505894209 is an apocalyptic number.

It is an amenable number.

148505894209 is a deficient number, since it is larger than the sum of its proper divisors (146601107).

148505894209 is a wasteful number, since it uses less digits than its factorization.

148505894209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146601106.

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 148505894209 in words is "one hundred forty-eight billion, five hundred five million, eight hundred ninety-four thousand, two hundred nine".