685427911700 has 36 divisors (see below), whose sum is σ = 1699861222752. Its totient is φ = 235003855200.

The previous prime is 685427911687. The next prime is 685427911709. The reversal of 685427911700 is 7119724586.

It is a happy number.

It is a super-2 number, since 2×685427911700² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685427911709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489590666 + ... + 489592065.

Almost surely, 2^685427911700 is an apocalyptic number.

It is an amenable number.

685427911700 is an abundant number, since it is smaller than the sum of its proper divisors (1014433311052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685427911700 is a wasteful number, since it uses less digits than its factorization.

685427911700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979182752 (or 979182745 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 685427911700 in words is "six hundred eighty-five billion, four hundred twenty-seven million, nine hundred eleven thousand, seven hundred".