204345862957 has 16 divisors (see below), whose sum is σ = 212105708080. Its totient is φ = 196705179648.

The previous prime is 204345862939. The next prime is 204345862969. The reversal of 204345862957 is 759268543402.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 43946413956 + 160399449001 = 209634^2 + 400499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204345862957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204345862898 and 204345862907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204345868957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12614419 + ... + 12630607.

It is an arithmetic number, because the mean of its divisors is an integer number (13256606755).

Almost surely, 2^204345862957 is an apocalyptic number.

It is an amenable number.

204345862957 is a deficient number, since it is larger than the sum of its proper divisors (7759845123).

204345862957 is a wasteful number, since it uses less digits than its factorization.

204345862957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19840.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 204345862957 in words is "two hundred four billion, three hundred forty-five million, eight hundred sixty-two thousand, nine hundred fifty-seven".