204719256651 has 32 divisors (see below), whose sum is σ = 336032686080. Its totient is φ = 107957061504.

The previous prime is 204719256649. The next prime is 204719256653. The reversal of 204719256651 is 156652917402.

It is an interprime number because it is at equal distance from previous prime (204719256649) and next prime (204719256653).

It is not a de Polignac number, because 204719256651 - 2¹ = 204719256649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204719256651.

It is not an unprimeable number, because it can be changed into a prime (204719256653) 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 31 ways as a sum of consecutive naturals, for example, 1037590 + ... + 1219028.

It is an arithmetic number, because the mean of its divisors is an integer number (10501021440).

Almost surely, 2^204719256651 is an apocalyptic number.

204719256651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

204719256651 is a deficient number, since it is larger than the sum of its proper divisors (131313429429).

204719256651 is a wasteful number, since it uses less digits than its factorization.

204719256651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185595.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 204719256651 in words is "two hundred four billion, seven hundred nineteen million, two hundred fifty-six thousand, six hundred fifty-one".