865337738780 has 48 divisors (see below), whose sum is σ = 1860493307904. Its totient is φ = 337899374400.

The previous prime is 865337738767. The next prime is 865337738789. The reversal of 865337738780 is 87837733568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865337738789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1291805 + ... + 1843755.

It is an arithmetic number, because the mean of its divisors is an integer number (38760277248).

Almost surely, 2^865337738780 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 865337738780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930246653952).

865337738780 is an abundant number, since it is smaller than the sum of its proper divisors (995155569124).

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

865337738780 is a wasteful number, since it uses less digits than its factorization.

865337738780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553826 (or 553824 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 865337738780 in words is "eight hundred sixty-five billion, three hundred thirty-seven million, seven hundred thirty-eight thousand, seven hundred eighty".