609556993438 has 4 divisors (see below), whose sum is σ = 914335490160. Its totient is φ = 304778496718.

The previous prime is 609556993421. The next prime is 609556993439. The reversal of 609556993438 is 834399655906.

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

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609556993439) 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 as a sum of consecutive naturals, namely, 152389248358 + ... + 152389248361.

It is an arithmetic number, because the mean of its divisors is an integer number (228583872540).

Almost surely, 2^609556993438 is an apocalyptic number.

609556993438 is a deficient number, since it is larger than the sum of its proper divisors (304778496722).

609556993438 is a wasteful number, since it uses less digits than its factorization.

609556993438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304778496721.

The product of its (nonzero) digits is 188956800, while the sum is 67.

The spelling of 609556993438 in words is "six hundred nine billion, five hundred fifty-six million, nine hundred ninety-three thousand, four hundred thirty-eight".