265155403560 has 128 divisors (see below), whose sum is σ = 842812128000. Its totient is φ = 66505052160.

The previous prime is 265155403559. The next prime is 265155403673. The reversal of 265155403560 is 65304551562.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3118005 + ... + 3201915.

It is an arithmetic number, because the mean of its divisors is an integer number (6584469750).

Almost surely, 2^265155403560 is an apocalyptic number.

265155403560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265155403560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421406064000).

265155403560 is an abundant number, since it is smaller than the sum of its proper divisors (577656724440).

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

265155403560 is a wasteful number, since it uses less digits than its factorization.

265155403560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85491 (or 85487 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 265155403560 in words is "two hundred sixty-five billion, one hundred fifty-five million, four hundred three thousand, five hundred sixty".