265351663621360 has 80 divisors (see below), whose sum is σ = 636971723200512. Its totient is φ = 102696171321600.

The previous prime is 265351663621249. The next prime is 265351663621393. The reversal of 265351663621360 is 63126366153562.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1640205 + ... + 23095315.

Almost surely, 2^{265351663621360} is an apocalyptic number.

265351663621360 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 265351663621360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318485861600256).

265351663621360 is an abundant number, since it is smaller than the sum of its proper divisors (371620059579152).

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

265351663621360 is a wasteful number, since it uses less digits than its factorization.

265351663621360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21460142 (or 21460136 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 55.

The spelling of 265351663621360 in words is "two hundred sixty-five trillion, three hundred fifty-one billion, six hundred sixty-three million, six hundred twenty-one thousand, three hundred sixty".