204423440651 has 4 divisors (see below), whose sum is σ = 204436910952. Its totient is φ = 204409970352.

The previous prime is 204423440593. The next prime is 204423440659. The reversal of 204423440651 is 156044324402.

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

It is a cyclic number.

It is not a de Polignac number, because 204423440651 - 2⁶ = 204423440587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204423440659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6712361 + ... + 6742746.

It is an arithmetic number, because the mean of its divisors is an integer number (51109227738).

Almost surely, 2^204423440651 is an apocalyptic number.

204423440651 is a deficient number, since it is larger than the sum of its proper divisors (13470301).

204423440651 is a wasteful number, since it uses less digits than its factorization.

204423440651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470300.

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 204423440651 in words is "two hundred four billion, four hundred twenty-three million, four hundred forty thousand, six hundred fifty-one".