204754997538 has 48 divisors (see below), whose sum is σ = 546013331136. Its totient is φ = 54001317600.

The previous prime is 204754997537. The next prime is 204754997581. The reversal of 204754997538 is 835799457402.

204754997538 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 5 + 4 + 9 + 97 + 538 = 666.

It is a super-2 number, since 2×204754997538² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (204754997537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62499888 + ... + 62503163.

It is an arithmetic number, because the mean of its divisors is an integer number (11375277732).

Almost surely, 2^204754997538 is an apocalyptic number.

204754997538 is an abundant number, since it is smaller than the sum of its proper divisors (341258333598).

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

204754997538 is a wasteful number, since it uses less digits than its factorization.

204754997538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125003079 (or 125003076 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 204754997538 in words is "two hundred four billion, seven hundred fifty-four million, nine hundred ninety-seven thousand, five hundred thirty-eight".