680265155653 has 4 divisors (see below), whose sum is σ = 680266806028. Its totient is φ = 680263505280.

The previous prime is 680265155629. The next prime is 680265155659. The reversal of 680265155653 is 356551562086.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 277652063329 + 402613092324 = 526927^2 + 634518^2 .

It is a cyclic number.

It is not a de Polignac number, because 680265155653 - 2²⁵ = 680231601221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680265155653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680265155659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373813 + ... + 1224853.

It is an arithmetic number, because the mean of its divisors is an integer number (170066701507).

Almost surely, 2^680265155653 is an apocalyptic number.

It is an amenable number.

680265155653 is a deficient number, since it is larger than the sum of its proper divisors (1650375).

680265155653 is an equidigital number, since it uses as much as digits as its factorization.

680265155653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650374.

The product of its (nonzero) digits is 6480000, while the sum is 52.

The spelling of 680265155653 in words is "six hundred eighty billion, two hundred sixty-five million, one hundred fifty-five thousand, six hundred fifty-three".