1825198787895 has 32 divisors (see below), whose sum is σ = 3405618739200. Its totient is φ = 834376586400.

The previous prime is 1825198787891. The next prime is 1825198787917. The reversal of 1825198787895 is 5987878915281.

It is not a de Polignac number, because 1825198787895 - 2² = 1825198787891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1825198787895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1825198787891) 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 31 ways as a sum of consecutive naturals, for example, 177370831 + ... + 177381120.

It is an arithmetic number, because the mean of its divisors is an integer number (106425585600).

Almost surely, 2^{1825198787895} is an apocalyptic number.

1825198787895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1825198787895 is a deficient number, since it is larger than the sum of its proper divisors (1580419951305).

1825198787895 is an equidigital number, since it uses as much as digits as its factorization.

1825198787895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354751980 (or 354751966 counting only the distinct ones).

The product of its digits is 812851200, while the sum is 78.

The spelling of 1825198787895 in words is "one trillion, eight hundred twenty-five billion, one hundred ninety-eight million, seven hundred eighty-seven thousand, eight hundred ninety-five".