265565318378 has 4 divisors (see below), whose sum is σ = 398347977570. Its totient is φ = 132782659188.

The previous prime is 265565318353. The next prime is 265565318383. The reversal of 265565318378 is 873813565562.

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

It can be written as a sum of positive squares in only one way, i.e., 265557794329 + 7524049 = 515323^2 + 2743^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 66391329593 + ... + 66391329596.

Almost surely, 2^265565318378 is an apocalyptic number.

265565318378 is a deficient number, since it is larger than the sum of its proper divisors (132782659192).

265565318378 is a wasteful number, since it uses less digits than its factorization.

265565318378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132782659191.

The product of its digits is 36288000, while the sum is 59.

The spelling of 265565318378 in words is "two hundred sixty-five billion, five hundred sixty-five million, three hundred eighteen thousand, three hundred seventy-eight".