83173525661 has 16 divisors (see below), whose sum is σ = 91449388800. Its totient is φ = 75294121728.

The previous prime is 83173525613. The next prime is 83173525663. The reversal of 83173525661 is 16652537138.

It is not a de Polignac number, because 83173525661 - 2¹⁴ = 83173509277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83173525663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191081 + ... + 450398.

It is an arithmetic number, because the mean of its divisors is an integer number (5715586800).

Almost surely, 2^83173525661 is an apocalyptic number.

It is an amenable number.

83173525661 is a deficient number, since it is larger than the sum of its proper divisors (8275863139).

83173525661 is a wasteful number, since it uses less digits than its factorization.

83173525661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641788.

The product of its digits is 907200, while the sum is 47.

The spelling of 83173525661 in words is "eighty-three billion, one hundred seventy-three million, five hundred twenty-five thousand, six hundred sixty-one".