65920413800 has 48 divisors (see below), whose sum is σ = 162280556460. Its totient is φ = 24817095680.

The previous prime is 65920413787. The next prime is 65920413803. The reversal of 65920413800 is 831402956.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19239354436 + 46681059364 = 138706^2 + 216058^2 .

It is not an unprimeable number, because it can be changed into a prime (65920413803) 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 11 ways as a sum of consecutive naturals, for example, 9690779 + ... + 9697578.

Almost surely, 2^65920413800 is an apocalyptic number.

It is an amenable number.

65920413800 is an abundant number, since it is smaller than the sum of its proper divisors (96360142660).

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

65920413800 is a wasteful number, since it uses less digits than its factorization.

65920413800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19388390 (or 19388381 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 65920413800 in words is "sixty-five billion, nine hundred twenty million, four hundred thirteen thousand, eight hundred".