204044156661145 has 4 divisors (see below), whose sum is σ = 244852987993380. Its totient is φ = 163235325328912.

The previous prime is 204044156661143. The next prime is 204044156661181. The reversal of 204044156661145 is 541166651440402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139284749194816 + 64759407466329 = 11801896^2 + 8047323^2 .

It is a cyclic number.

It is not a de Polignac number, because 204044156661145 - 2¹ = 204044156661143 is a prime.

It is a super-2 number, since 2×204044156661145² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204044156661143) 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, 20404415666110 + ... + 20404415666119.

It is an arithmetic number, because the mean of its divisors is an integer number (61213246998345).

Almost surely, 2^{204044156661145} is an apocalyptic number.

It is an amenable number.

204044156661145 is a deficient number, since it is larger than the sum of its proper divisors (40808831332235).

204044156661145 is an equidigital number, since it uses as much as digits as its factorization.

204044156661145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40808831332234.

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 204044156661145 in words is "two hundred four trillion, forty-four billion, one hundred fifty-six million, six hundred sixty-one thousand, one hundred forty-five".