655558438 has 4 divisors (see below), whose sum is σ = 983337660. Its totient is φ = 327779218.

The previous prime is 655558417. The next prime is 655558441. The reversal of 655558438 is 834855556.

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

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 a junction number, because it is equal to n+sod(n) for n = 655558391 and 655558400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163889608 + ... + 163889611.

It is an arithmetic number, because the mean of its divisors is an integer number (245834415).

Almost surely, 2^655558438 is an apocalyptic number.

655558438 is a deficient number, since it is larger than the sum of its proper divisors (327779222).

655558438 is a wasteful number, since it uses less digits than its factorization.

655558438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327779221.

The product of its digits is 2880000, while the sum is 49.

The square root of 655558438 is about 25603.8754488456. The cubic root of 655558438 is about 868.7012983205.

The spelling of 655558438 in words is "six hundred fifty-five million, five hundred fifty-eight thousand, four hundred thirty-eight".