265643325055240 has 64 divisors (see below), whose sum is σ = 658489394531520. Its totient is φ = 95641161120000.

The previous prime is 265643325055237. The next prime is 265643325055249. The reversal of 265643325055240 is 42550523346562.

It is a super-2 number, since 2×265643325055240² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (265643325055249) 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, 2988741846 + ... + 2988830725.

It is an arithmetic number, because the mean of its divisors is an integer number (10288896789555).

Almost surely, 2^{265643325055240} is an apocalyptic number.

265643325055240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265643325055240 is an abundant number, since it is smaller than the sum of its proper divisors (392846069476280).

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

265643325055240 is a wasteful number, since it uses less digits than its factorization.

265643325055240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977572694 (or 5977572690 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 52.

The spelling of 265643325055240 in words is "two hundred sixty-five trillion, six hundred forty-three billion, three hundred twenty-five million, fifty-five thousand, two hundred forty".