609231800578 has 4 divisors (see below), whose sum is σ = 913847700870. Its totient is φ = 304615900288.

The previous prime is 609231800561. The next prime is 609231800623. The reversal of 609231800578 is 875008132906.

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

It can be written as a sum of positive squares in only one way, i.e., 554916235329 + 54315565249 = 744927^2 + 233057^2 .

It is a super-2 number, since 2×609231800578² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152307950143 + ... + 152307950146.

Almost surely, 2^609231800578 is an apocalyptic number.

609231800578 is a deficient number, since it is larger than the sum of its proper divisors (304615900292).

609231800578 is a wasteful number, since it uses less digits than its factorization.

609231800578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304615900291.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 609231800578 in words is "six hundred nine billion, two hundred thirty-one million, eight hundred thousand, five hundred seventy-eight".