265751278564128 has 384 divisors, whose sum is σ = 841589414830080. Its totient is φ = 71729241292800.

The previous prime is 265751278564097. The next prime is 265751278564129. The reversal of 265751278564128 is 821465872157562.

It is not an unprimeable number, because it can be changed into a prime (265751278564129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19573630876 + ... + 19573644452.

It is an arithmetic number, because the mean of its divisors is an integer number (2191639101120).

Almost surely, 2^{265751278564128} is an apocalyptic number.

265751278564128 is a gapful number since it is divisible by the number (28) 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 265751278564128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420794707415040).

265751278564128 is an abundant number, since it is smaller than the sum of its proper divisors (575838136265952).

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

265751278564128 is a wasteful number, since it uses less digits than its factorization.

265751278564128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17840 (or 17832 counting only the distinct ones).

The product of its digits is 451584000, while the sum is 69.

The spelling of 265751278564128 in words is "two hundred sixty-five trillion, seven hundred fifty-one billion, two hundred seventy-eight million, five hundred sixty-four thousand, one hundred twenty-eight".