65729339904 has 80 divisors (see below), whose sum is σ = 176015153952. Its totient is φ = 21796159488.

The previous prime is 65729339899. The next prime is 65729339989. The reversal of 65729339904 is 40993392756.

It is a happy number.

It is a super-2 number, since 2×65729339904² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185587 + ... + 407309.

Almost surely, 2^65729339904 is an apocalyptic number.

65729339904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65729339904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88007576976).

65729339904 is an abundant number, since it is smaller than the sum of its proper divisors (110285814048).

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

65729339904 is a wasteful number, since it uses less digits than its factorization.

65729339904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221937 (or 221921 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 57.

The spelling of 65729339904 in words is "sixty-five billion, seven hundred twenty-nine million, three hundred thirty-nine thousand, nine hundred four".