65420481940 has 144 divisors (see below), whose sum is σ = 165869343360. Its totient is φ = 21556972800.

The previous prime is 65420481857. The next prime is 65420481941. The reversal of 65420481940 is 4918402456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65420481941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1026610 + ... + 1088470.

It is an arithmetic number, because the mean of its divisors is an integer number (1151870440).

Almost surely, 2^65420481940 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 65420481940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82934671680).

65420481940 is an abundant number, since it is smaller than the sum of its proper divisors (100448861420).

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

65420481940 is a wasteful number, since it uses less digits than its factorization.

65420481940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61934 (or 61921 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 65420481940 in words is "sixty-five billion, four hundred twenty million, four hundred eighty-one thousand, nine hundred forty".