204625405781 has 8 divisors (see below), whose sum is σ = 220404354720. Its totient is φ = 189347375952.

The previous prime is 204625405769. The next prime is 204625405811. The reversal of 204625405781 is 187504526402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204625405781 - 2³⁰ = 203551663957 is a prime.

It is a super-2 number, since 2×204625405781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204625405381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125228930 + ... + 125230563.

It is an arithmetic number, because the mean of its divisors is an integer number (27550544340).

Almost surely, 2^204625405781 is an apocalyptic number.

It is an amenable number.

204625405781 is a deficient number, since it is larger than the sum of its proper divisors (15778948939).

204625405781 is a wasteful number, since it uses less digits than its factorization.

204625405781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250459555.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 204625405781 in words is "two hundred four billion, six hundred twenty-five million, four hundred five thousand, seven hundred eighty-one".