145779730209 has 8 divisors (see below), whose sum is σ = 215969970720. Its totient is φ = 97186486788.

The previous prime is 145779730207. The next prime is 145779730219. The reversal of 145779730209 is 902037977541.

145779730209 is a `hidden beast` number, since 14 + 577 + 9 + 7 + 30 + 20 + 9 = 666.

It is not a de Polignac number, because 145779730209 - 2¹ = 145779730207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145779730207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2699624607 + ... + 2699624660.

It is an arithmetic number, because the mean of its divisors is an integer number (26996246340).

Almost surely, 2^145779730209 is an apocalyptic number.

It is an amenable number.

145779730209 is a deficient number, since it is larger than the sum of its proper divisors (70190240511).

145779730209 is an equidigital number, since it uses as much as digits as its factorization.

145779730209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399249276 (or 5399249270 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The spelling of 145779730209 in words is "one hundred forty-five billion, seven hundred seventy-nine million, seven hundred thirty thousand, two hundred nine".