265640660364434 has 8 divisors (see below), whose sum is σ = 398461614619068. Its totient is φ = 132820122158080.

The previous prime is 265640660364377. The next prime is 265640660364437. The reversal of 265640660364434 is 434463066046562.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 254605009584409 + 11035650780025 = 15956347^2 + 3321995^2 .

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

It is not an unprimeable number, because it can be changed into a prime (265640660364437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102410927 + ... + 104972754.

Almost surely, 2^{265640660364434} is an apocalyptic number.

265640660364434 is a deficient number, since it is larger than the sum of its proper divisors (132820954254634).

265640660364434 is a wasteful number, since it uses less digits than its factorization.

265640660364434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208024140.

The product of its (nonzero) digits is 179159040, while the sum is 59.

The spelling of 265640660364434 in words is "two hundred sixty-five trillion, six hundred forty billion, six hundred sixty million, three hundred sixty-four thousand, four hundred thirty-four".