265640326405355 has 16 divisors (see below), whose sum is σ = 347748354620928. Its totient is φ = 193192398972000.

The previous prime is 265640326405273. The next prime is 265640326405381. The reversal of 265640326405355 is 553504623046562.

It is not a de Polignac number, because 265640326405355 - 2⁸ = 265640326405099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265640326405355.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12364520 + ... + 26156490.

It is an arithmetic number, because the mean of its divisors is an integer number (21734272163808).

Almost surely, 2^{265640326405355} is an apocalyptic number.

265640326405355 is a deficient number, since it is larger than the sum of its proper divisors (82108028215573).

265640326405355 is a wasteful number, since it uses less digits than its factorization.

265640326405355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14142178.

The product of its (nonzero) digits is 77760000, while the sum is 56.

The spelling of 265640326405355 in words is "two hundred sixty-five trillion, six hundred forty billion, three hundred twenty-six million, four hundred five thousand, three hundred fifty-five".