265636533540 has 48 divisors (see below), whose sum is σ = 850036908672. Its totient is φ = 60716921856.

The previous prime is 265636533521. The next prime is 265636533541. The reversal of 265636533540 is 45335636562.

It is a happy number.

It is a super-2 number, since 2×265636533540² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 265636533540.

It is not an unprimeable number, because it can be changed into a prime (265636533541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316233549 + ... + 316234388.

It is an arithmetic number, because the mean of its divisors is an integer number (17709102264).

Almost surely, 2^265636533540 is an apocalyptic number.

265636533540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265636533540 is an abundant number, since it is smaller than the sum of its proper divisors (584400375132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265636533540 is a wasteful number, since it uses less digits than its factorization.

265636533540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632467956 (or 632467954 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 48.

The spelling of 265636533540 in words is "two hundred sixty-five billion, six hundred thirty-six million, five hundred thirty-three thousand, five hundred forty".