765861641660 has 12 divisors (see below), whose sum is σ = 1608309447528. Its totient is φ = 306344656656.

The previous prime is 765861641659. The next prime is 765861641663. The reversal of 765861641660 is 66146168567.

It is a junction number, because it is equal to n+sod(n) for n = 765861641596 and 765861641605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765861641663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19146541022 + ... + 19146541061.

It is an arithmetic number, because the mean of its divisors is an integer number (134025787294).

Almost surely, 2^765861641660 is an apocalyptic number.

It is an amenable number.

765861641660 is an abundant number, since it is smaller than the sum of its proper divisors (842447805868).

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

765861641660 is a wasteful number, since it uses less digits than its factorization.

765861641660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38293082092 (or 38293082090 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 765861641660 in words is "seven hundred sixty-five billion, eight hundred sixty-one million, six hundred forty-one thousand, six hundred sixty".