685701172225 has 6 divisors (see below), whose sum is σ = 850269453590. Its totient is φ = 548560937760.

The previous prime is 685701172193. The next prime is 685701172229. The reversal of 685701172225 is 522271107586.

It is a happy number.

685701172225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 6050972944 + 679650199281 = 77788^2 + 824409^2 .

It is not a de Polignac number, because 685701172225 - 2⁵ = 685701172193 is a prime.

It is a super-2 number, since 2×685701172225² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685701172229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13714023420 + ... + 13714023469.

Almost surely, 2^685701172225 is an apocalyptic number.

It is an amenable number.

685701172225 is a deficient number, since it is larger than the sum of its proper divisors (164568281365).

685701172225 is a wasteful number, since it uses less digits than its factorization.

685701172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27428046899 (or 27428046894 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 685701172225 in words is "six hundred eighty-five billion, seven hundred one million, one hundred seventy-two thousand, two hundred twenty-five".