204038735778 has 20 divisors (see below), whose sum is σ = 457197908310. Its totient is φ = 68012911872.

The previous prime is 204038735767. The next prime is 204038735783. The reversal of 204038735778 is 877537830402.

It is a happy number.

204038735778 is a `hidden beast` number, since 20 + 40 + 3 + 8 + 7 + 3 + 577 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 186756215409 + 17282520369 = 432153^2 + 131463^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 629749023 + ... + 629749346.

Almost surely, 2^204038735778 is an apocalyptic number.

204038735778 is an abundant number, since it is smaller than the sum of its proper divisors (253159172532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204038735778 is a wasteful number, since it uses less digits than its factorization.

204038735778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259498383 (or 1259498374 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The spelling of 204038735778 in words is "two hundred four billion, thirty-eight million, seven hundred thirty-five thousand, seven hundred seventy-eight".