265640520134242 has 16 divisors (see below), whose sum is σ = 434684850580800. Its totient is φ = 120745590112240.

The previous prime is 265640520134233. The next prime is 265640520134357. The reversal of 265640520134242 is 242431025046562.

It is a super-3 number, since 3×265640520134242³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 265640520134192 and 265640520134201.

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 in 7 ways as a sum of consecutive naturals, for example, 26193384 + ... + 34890892.

It is an arithmetic number, because the mean of its divisors is an integer number (27167803161300).

Almost surely, 2^{265640520134242} is an apocalyptic number.

265640520134242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

265640520134242 is a deficient number, since it is larger than the sum of its proper divisors (169044330446558).

265640520134242 is a wasteful number, since it uses less digits than its factorization.

265640520134242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10085801.

The product of its (nonzero) digits is 2764800, while the sum is 46.

The spelling of 265640520134242 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred twenty million, one hundred thirty-four thousand, two hundred forty-two".