655538507 has 4 divisors (see below), whose sum is σ = 705964560. Its totient is φ = 605112456.

The previous prime is 655538497. The next prime is 655538531. The reversal of 655538507 is 705835556.

655538507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 655538507 - 2⁴ = 655538491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655538537) 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, 25213007 + ... + 25213032.

It is an arithmetic number, because the mean of its divisors is an integer number (176491140).

Almost surely, 2^655538507 is an apocalyptic number.

655538507 is a deficient number, since it is larger than the sum of its proper divisors (50426053).

655538507 is a wasteful number, since it uses less digits than its factorization.

655538507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50426052.

The product of its (nonzero) digits is 630000, while the sum is 44.

The square root of 655538507 is about 25603.4862274652. The cubic root of 655538507 is about 868.6924944977.

The spelling of 655538507 in words is "six hundred fifty-five million, five hundred thirty-eight thousand, five hundred seven".