655510768069 has 4 divisors (see below), whose sum is σ = 665294510944. Its totient is φ = 645727025196.

The previous prime is 655510768063. The next prime is 655510768111. The reversal of 655510768069 is 960867015556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655510768069 - 2⁹ = 655510767557 is a prime.

It is a super-2 number, since 2×655510768069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655510768063) 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, 4891871337 + ... + 4891871470.

It is an arithmetic number, because the mean of its divisors is an integer number (166323627736).

Almost surely, 2^655510768069 is an apocalyptic number.

It is an amenable number.

655510768069 is a deficient number, since it is larger than the sum of its proper divisors (9783742875).

655510768069 is an equidigital number, since it uses as much as digits as its factorization.

655510768069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783742874.

The product of its (nonzero) digits is 13608000, while the sum is 58.

The spelling of 655510768069 in words is "six hundred fifty-five billion, five hundred ten million, seven hundred sixty-eight thousand, sixty-nine".