204085961678 has 4 divisors (see below), whose sum is σ = 306128942520. Its totient is φ = 102042980838.

The previous prime is 204085961671. The next prime is 204085961699. The reversal of 204085961678 is 876169580402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204085961671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51021490418 + ... + 51021490421.

It is an arithmetic number, because the mean of its divisors is an integer number (76532235630).

Almost surely, 2^204085961678 is an apocalyptic number.

204085961678 is a deficient number, since it is larger than the sum of its proper divisors (102042980842).

204085961678 is a wasteful number, since it uses less digits than its factorization.

204085961678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102042980841.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 204085961678 in words is "two hundred four billion, eighty-five million, nine hundred sixty-one thousand, six hundred seventy-eight".