685002412640 has 384 divisors, whose sum is σ = 2153303792640. Its totient is φ = 199828021248.

The previous prime is 685002412637. The next prime is 685002412657. The reversal of 685002412640 is 46214200586.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 685002412594 and 685002412603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10202219 + ... + 10269141.

It is an arithmetic number, because the mean of its divisors is an integer number (5607561960).

Almost surely, 2^685002412640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685002412640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076651896320).

685002412640 is an abundant number, since it is smaller than the sum of its proper divisors (1468301380000).

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

685002412640 is a wasteful number, since it uses less digits than its factorization.

685002412640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67014 (or 67006 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 685002412640 in words is "six hundred eighty-five billion, two million, four hundred twelve thousand, six hundred forty".