205172131676 has 24 divisors (see below), whose sum is σ = 368775647856. Its totient is φ = 99807966720.

The previous prime is 205172131631. The next prime is 205172131721. The reversal of 205172131676 is 676131271502.

It is an interprime number because it is at equal distance from previous prime (205172131631) and next prime (205172131721).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4359020 + ... + 4405836.

It is an arithmetic number, because the mean of its divisors is an integer number (15365651994).

Almost surely, 2^205172131676 is an apocalyptic number.

It is an amenable number.

205172131676 is a deficient number, since it is larger than the sum of its proper divisors (163603516180).

205172131676 is a wasteful number, since it uses less digits than its factorization.

205172131676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76469 (or 76467 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 205172131676 in words is "two hundred five billion, one hundred seventy-two million, one hundred thirty-one thousand, six hundred seventy-six".