1825681987684 has 27 divisors (see below), whose sum is σ = 3227372270731. Its totient is φ = 903667846400.

The previous prime is 1825681987637. The next prime is 1825681987687. The reversal of 1825681987684 is 4867891865281.

The square root of 1825681987684 is 1351178.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1212592987684 + 613089000000 = 1101178^2 + 783000^2 .

It is a super-2 number, since 2×1825681987684² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1825681987687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 272934612 + ... + 272941300.

Almost surely, 2^{1825681987684} is an apocalyptic number.

1825681987684 is the 1351178-th square number.

It is an amenable number.

1825681987684 is a deficient number, since it is larger than the sum of its proper divisors (1401690283047).

1825681987684 is an frugal number, since it uses more digits than its factorization.

1825681987684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584 (or 6792 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 73.

The spelling of 1825681987684 in words is "one trillion, eight hundred twenty-five billion, six hundred eighty-one million, nine hundred eighty-seven thousand, six hundred eighty-four".