265692080640 has 960 divisors, whose sum is σ = 1055244960000. Its totient is φ = 56993513472.

The previous prime is 265692080617. The next prime is 265692080683. The reversal of 265692080640 is 46080296562.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 265692080640.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 761295186 + ... + 761295534.

It is an arithmetic number, because the mean of its divisors is an integer number (1099213500).

Almost surely, 2^265692080640 is an apocalyptic number.

265692080640 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 265692080640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527622480000).

265692080640 is an abundant number, since it is smaller than the sum of its proper divisors (789552879360).

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

265692080640 is an equidigital number, since it uses as much as digits as its factorization.

265692080640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 265692080640 in words is "two hundred sixty-five billion, six hundred ninety-two million, eighty thousand, six hundred forty".