65789773644 has 48 divisors (see below), whose sum is σ = 175455399168. Its totient is φ = 18795363648.

The previous prime is 65789773589. The next prime is 65789773649. The reversal of 65789773644 is 44637798756.

It is a super-2 number, since 2×65789773644² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65789773649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1106974 + ... + 1164890.

It is an arithmetic number, because the mean of its divisors is an integer number (3655320816).

Almost surely, 2^65789773644 is an apocalyptic number.

It is an amenable number.

65789773644 is an abundant number, since it is smaller than the sum of its proper divisors (109665625524).

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

65789773644 is a wasteful number, since it uses less digits than its factorization.

65789773644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71454 (or 71452 counting only the distinct ones).

The product of its digits is 213373440, while the sum is 66.

The spelling of 65789773644 in words is "sixty-five billion, seven hundred eighty-nine million, seven hundred seventy-three thousand, six hundred forty-four".