680215313533 has 4 divisors (see below), whose sum is σ = 777388929760. Its totient is φ = 583041697308.

The previous prime is 680215313521. The next prime is 680215313581. The reversal of 680215313533 is 335313512086.

It is a happy number.

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 de Polignac number, because none of the positive numbers 2^k-680215313533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680215313513) 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, 48586808103 + ... + 48586808116.

It is an arithmetic number, because the mean of its divisors is an integer number (194347232440).

Almost surely, 2^680215313533 is an apocalyptic number.

It is an amenable number.

680215313533 is a deficient number, since it is larger than the sum of its proper divisors (97173616227).

680215313533 is an equidigital number, since it uses as much as digits as its factorization.

680215313533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97173616226.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 680215313533 in words is "six hundred eighty billion, two hundred fifteen million, three hundred thirteen thousand, five hundred thirty-three".