685871652532 has 48 divisors (see below), whose sum is σ = 1378729759680. Its totient is φ = 295260768000.

The previous prime is 685871652509. The next prime is 685871652533. The reversal of 685871652532 is 235256178586.

It is a super-2 number, since 2×685871652532² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685871652533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2635368 + ... + 2883904.

It is an arithmetic number, because the mean of its divisors is an integer number (28723536660).

Almost surely, 2^685871652532 is an apocalyptic number.

It is an amenable number.

685871652532 is an abundant number, since it is smaller than the sum of its proper divisors (692858107148).

685871652532 is a wasteful number, since it uses less digits than its factorization.

685871652532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251872 (or 251870 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 58.

The spelling of 685871652532 in words is "six hundred eighty-five billion, eight hundred seventy-one million, six hundred fifty-two thousand, five hundred thirty-two".