265312556540 has 24 divisors (see below), whose sum is σ = 557193812112. Its totient is φ = 106117890560.

The previous prime is 265312556539. The next prime is 265312556543. The reversal of 265312556540 is 45655213562.

It is a junction number, because it is equal to n+sod(n) for n = 265312556491 and 265312556500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265312556543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135446 + ... + 740925.

It is an arithmetic number, because the mean of its divisors is an integer number (23216408838).

Almost surely, 2^265312556540 is an apocalyptic number.

265312556540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265312556540 is an abundant number, since it is smaller than the sum of its proper divisors (291881255572).

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

265312556540 is a wasteful number, since it uses less digits than its factorization.

265312556540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891517 (or 891515 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 265312556540 in words is "two hundred sixty-five billion, three hundred twelve million, five hundred fifty-six thousand, five hundred forty".