265165551648 has 288 divisors, whose sum is σ = 813326754240. Its totient is φ = 81777346560.

The previous prime is 265165551643. The next prime is 265165551653. The reversal of 265165551648 is 846155561562.

265165551648 is a `hidden beast` number, since 2 + 65 + 1 + 65 + 5 + 516 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (265165551643) and next prime (265165551653).

It is a tau number, because it is divible by the number of its divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 265165551594 and 265165551603.

It is not an unprimeable number, because it can be changed into a prime (265165551643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19027243 + ... + 19041173.

It is an arithmetic number, because the mean of its divisors is an integer number (2824051230).

Almost surely, 2^265165551648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265165551648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406663377120).

265165551648 is an abundant number, since it is smaller than the sum of its proper divisors (548161202592).

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

265165551648 is a wasteful number, since it uses less digits than its factorization.

265165551648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14072 (or 14061 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The spelling of 265165551648 in words is "two hundred sixty-five billion, one hundred sixty-five million, five hundred fifty-one thousand, six hundred forty-eight".