265640506356433 has 32 divisors (see below), whose sum is σ = 295515282585600. Its totient is φ = 237125863134720.

The previous prime is 265640506356419. The next prime is 265640506356457. The reversal of 265640506356433 is 334653605046562.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265640506356433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265640506306433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5749895868 + ... + 5749942066.

It is an arithmetic number, because the mean of its divisors is an integer number (9234852580800).

Almost surely, 2^{265640506356433} is an apocalyptic number.

It is an amenable number.

265640506356433 is a deficient number, since it is larger than the sum of its proper divisors (29874776229167).

265640506356433 is a wasteful number, since it uses less digits than its factorization.

265640506356433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56209.

The product of its (nonzero) digits is 139968000, while the sum is 58.

The spelling of 265640506356433 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred six million, three hundred fifty-six thousand, four hundred thirty-three".