1687213025850 has 384 divisors, whose sum is σ = 4993039210752. Its totient is φ = 372352204800.

The previous prime is 1687213025831. The next prime is 1687213025851. The reversal of 1687213025850 is 585203127861.

It is a self number, because there is not a number n which added to its sum of digits gives 1687213025850.

It is not an unprimeable number, because it can be changed into a prime (1687213025851) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 179543352 + ... + 179552748.

It is an arithmetic number, because the mean of its divisors is an integer number (13002706278).

Almost surely, 2^{1687213025850} is an apocalyptic number.

1687213025850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1687213025850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496519605376).

1687213025850 is an abundant number, since it is smaller than the sum of its proper divisors (3305826184902).

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

1687213025850 is a wasteful number, since it uses less digits than its factorization.

1687213025850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650 (or 9645 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 1687213025850 in words is "one trillion, six hundred eighty-seven billion, two hundred thirteen million, twenty-five thousand, eight hundred fifty".