65729273372 has 72 divisors (see below), whose sum is σ = 136334968224. Its totient is φ = 27160971264.

The previous prime is 65729273347. The next prime is 65729273383. The reversal of 65729273372 is 27337292756.

It is a happy number.

It is a super-2 number, since 2×65729273372² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23004968 + ... + 23007824.

Almost surely, 2^65729273372 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 65729273372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68167484112).

65729273372 is an abundant number, since it is smaller than the sum of its proper divisors (70605694852).

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

65729273372 is a wasteful number, since it uses less digits than its factorization.

65729273372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903 (or 3872 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 53.

The spelling of 65729273372 in words is "sixty-five billion, seven hundred twenty-nine million, two hundred seventy-three thousand, three hundred seventy-two".