1685206783380 has 48 divisors (see below), whose sum is σ = 4718881024704. Its totient is φ = 449359710720.

The previous prime is 1685206783363. The next prime is 1685206783411. The reversal of 1685206783380 is 833876025861.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1685206783380.

It is a congruent number.

It is an unprimeable number.

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, 54639 + ... + 1836681.

It is an arithmetic number, because the mean of its divisors is an integer number (98310021348).

Almost surely, 2^{1685206783380} is an apocalyptic number.

1685206783380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685206783380 is an abundant number, since it is smaller than the sum of its proper divisors (3033674241324).

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

1685206783380 is a wasteful number, since it uses less digits than its factorization.

1685206783380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797816 (or 1797814 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 1685206783380 in words is "one trillion, six hundred eighty-five billion, two hundred six million, seven hundred eighty-three thousand, three hundred eighty".