83785891925 has 12 divisors (see below), whose sum is σ = 104098636740. Its totient is φ = 66897016320.

The previous prime is 83785891921. The next prime is 83785891927. The reversal of 83785891925 is 52919858738.

It can be written as a sum of positive squares in 6 ways, for example, as 966836836 + 82819055089 = 31094^2 + 287783^2 .

It is not a de Polignac number, because 83785891925 - 2² = 83785891921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83785891921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3279452 + ... + 3304901.

It is an arithmetic number, because the mean of its divisors is an integer number (8674886395).

Almost surely, 2^83785891925 is an apocalyptic number.

It is an amenable number.

83785891925 is a deficient number, since it is larger than the sum of its proper divisors (20312744815).

83785891925 is a wasteful number, since it uses less digits than its factorization.

83785891925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584872 (or 6584867 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 65.

The spelling of 83785891925 in words is "eighty-three billion, seven hundred eighty-five million, eight hundred ninety-one thousand, nine hundred twenty-five".