65204643904 has 63 divisors (see below), whose sum is σ = 131864435661. Its totient is φ = 31990498560.

The previous prime is 65204643899. The next prime is 65204643919. The reversal of 65204643904 is 40934640256.

It is a happy number.

The square root of 65204643904 is 255352.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25905546304 + 39299097600 = 160952^2 + 198240^2 .

It is a super-2 number, since 2×65204643904² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 120525874 + ... + 120526414.

Almost surely, 2^65204643904 is an apocalyptic number.

65204643904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

65204643904 is the 255352-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65204643904

65204643904 is an abundant number, since it is smaller than the sum of its proper divisors (66659791757).

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

65204643904 is an frugal number, since it uses more digits than its factorization.

65204643904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 65204643904 in words is "sixty-five billion, two hundred four million, six hundred forty-three thousand, nine hundred four".