1691980083825 has 48 divisors (see below), whose sum is σ = 3017846595456. Its totient is φ = 833282944000.

The previous prime is 1691980083823. The next prime is 1691980083847. The reversal of 1691980083825 is 5283800891961.

It is not a de Polignac number, because 1691980083825 - 2¹ = 1691980083823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1691980083823) 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 47 ways as a sum of consecutive naturals, for example, 12451701 + ... + 12586850.

It is an arithmetic number, because the mean of its divisors is an integer number (62871804072).

Almost surely, 2^{1691980083825} is an apocalyptic number.

1691980083825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1691980083825 is a deficient number, since it is larger than the sum of its proper divisors (1325866511631).

1691980083825 is a wasteful number, since it uses less digits than its factorization.

1691980083825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25038634 (or 25038629 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 60.

The spelling of 1691980083825 in words is "one trillion, six hundred ninety-one billion, nine hundred eighty million, eighty-three thousand, eight hundred twenty-five".