685507252241 has 16 divisors (see below), whose sum is σ = 784809375744. Its totient is φ = 586548661824.

The previous prime is 685507252231. The next prime is 685507252271. The reversal of 685507252241 is 142252705586.

It is a cyclic number.

It is not a de Polignac number, because 685507252241 - 2³⁰ = 684433510417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685507252201) 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 15 ways as a sum of consecutive naturals, for example, 24838736 + ... + 24866318.

It is an arithmetic number, because the mean of its divisors is an integer number (49050585984).

Almost surely, 2^685507252241 is an apocalyptic number.

It is an amenable number.

685507252241 is a deficient number, since it is larger than the sum of its proper divisors (99302123503).

685507252241 is a wasteful number, since it uses less digits than its factorization.

685507252241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33680.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 685507252241 in words is "six hundred eighty-five billion, five hundred seven million, two hundred fifty-two thousand, two hundred forty-one".