265877863680 has 576 divisors, whose sum is σ = 1029846343680. Its totient is φ = 57574195200.

The previous prime is 265877863609. The next prime is 265877863739. The reversal of 265877863680 is 86368778562.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17014911 + ... + 17030529.

It is an arithmetic number, because the mean of its divisors is an integer number (1787927680).

Almost surely, 2^265877863680 is an apocalyptic number.

265877863680 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 265877863680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514923171840).

265877863680 is an abundant number, since it is smaller than the sum of its proper divisors (763968480000).

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

265877863680 is a wasteful number, since it uses less digits than its factorization.

265877863680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15698 (or 15684 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 265877863680 in words is "two hundred sixty-five billion, eight hundred seventy-seven million, eight hundred sixty-three thousand, six hundred eighty".